Some of these links will take you to different pages, others will link further down this page.
Guidescope Accessories
Optical Accessories
Adapters for Optical Accessories
Electronic Focusing Control for Astro-Physics Focusers
Related Photographic / Imaging Accessories
Guidescope Accessories
10 x 60 Vario-Finder with Quick Release Guider Bracket Kit (1060VGKIT)
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The Astro-Physics designed Guider Bracket greatly expands the versatility and functionality of the Baader 10 x 60 Vario-Finder Scope. By removing the Finder Scope’s 45° prism and reticle-eyepiece and substituting T-2 extension tubes, the finder transforms into a straight-through guidescope. This unique Guider Bracket provides the robust, flexure-free structure to hold even the heaviest guide cameras. Whether you use a feather-light camera, such as the SBIG ST-i, QHY5L-II and Starlight Xpress Lodestar, or a heavy-weight, such as the SBIG SG-4, this Guider Bracket will help you master autoguiding. |
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An enlarged Quick-Release Base (QRBASEG) provides the rigid foundation on which the bracket rests. The male dovetail base-rail allows the bracket to be positioned for proper balance, while providing an attachment point for the stabilizing guide ring. The guide ring is the key to rigidly holding the focuser’s draw tube and the guide camera flexure-free.
As your Astro-Physics mount precisely tracks around the sky, the protective felt lining of your telescope’s rings can allow a minute amount of scope flexure, affecting the otherwise perfect star shapes. Because this entire guidescope configuration is attached directly to your telescope (rather than the scope’s rings), guiding will follow your scope’s movement, not that of the scope’s rings and mounting plates. This will ensure that you get the imaging results you seek. The Guider Bracket rail can be directly attached to many Vixen-style and D-style universal dovetail plates for mounting convenience. See this link for the attachment hole pattern. |
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Please click this link for a clearance diagram. The image to the right shows the SBIG ST-i used as a guide camera. It is a very light weight camera configuration. |
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Weight: 2 lb. 5.7 oz. (1.07 kg) |
10 x 60 Quick Release Guider Bracket (S1060QRGB)
If you already own the Baader 10 x
60 Vario- Finder (1060VQ), or a similar size guidescope, then this Guider Bracket
will be perfect for improving your autoguiding technique. It is
lightweight, yet provides a flexure-free mounting configuration that
removes the problem of flexure in your guide scope’s focuser. The
bracket is shown with the QRBASEG, purchased separately. |
![]() Above photo shows Guide Bracket with QRBASEG (sold separately). |
The Base for Quick Release Guider Bracket (QRBASEG), shown with the bracket, is the recommended attachment method so that guiding will follow your scope’s movement, not that of the scope’s rings and mounting plate. However, the dovetail base-rail has ¼"-20 tapped holes for attaching to our 7" and 10" Sliding Bars (SB0800 and SB1000), our 15" Sliding Bar (SB1500), a Losmandy Adapter (LMDVA), or to many D-style and Vixen-style universal dovetail plates should these mounting methods be necessary. See this link for the attachment hole pattern. Please click this link for a clearance diagram. Additional accessories needed may include a 40 mm T-2 Extension Tube (BP25B) and/or a 15 mm T-2 Extension Tube (BP25A), depending on the guidescope and camera you use. Weight: 9.9 oz. (.28 kg) |
Base for Quick Release Guider Bracket (QRBASEG)
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This base is designed with a dual-radius curve in order to fit onto the predrilled holes of all Astro-Physics refractors or other commercial telescopes that utilizes the same hole spacing. Fortunately, the spacing between the holes of most finder brackets is the same. The dovetail design of this base accepts these items:
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The bracket is attached via two screws. The second set of attachment holes is provided for shifting the base forward or backward as needed. The base can be rotated 180° for either right-handed or left-handed use. Additionally, we have provided a central locking screw hole so that our traditional finder brackets can be used with this base (simply shift the forward thumbscrew back). The included stop screw can then be installed at the end of the base for use with these brackets (it is not used with the Guider Bracket). Starting in early October of 2013, we started to ship bases that were approximately 3/8" (9.5 mm) taller, so that the guide bracket rail will more easily clear the mounting rings of our refractors. This will allow the scope to rotate without interference. The mounting hole spacing is approximately 1 3/8" (34.9 mm) side-to-side and uses 10-32 x 5/8" Phillips Pan Head screws for attachment. The length is 2.30" (58.4 mm) and the height of the bottom of the dovetail above the radius of the base's foot is 1.25" (31.8 mm). A 1/4"-20 tapped hole on the bottom of the QRBASEG can be used to attach it to a dovetail plate. Weight: 4.4 oz. (.13 kg) |
Takahashi Adapter for Astro-Physics Quick Release Bases (QRBATAK-A)
We have designed this Takahashi Adapter to allow our Guider and Finder Brackets to be used with Takahashi and other brands of telescopes that require flat surface attachment, as well as with custom applications. The adapter can also be mounted to almost any brand of universal dovetail plate (or flat surface), allowing our Guider and Finder Brackets to be quickly removed / installed when transporting. Please reference the hole-pattern diagram when choosing this adapter. |
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Once the adapter has been secured to your Takahashi scope or other flat surface, the following Quick Release Bases can be attached to the top of the contoured base: |
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![]() Photo shows the older QRBATAK and Guider Bracket mounted on a Takahashi FSQ-ED for reference. Note: The QRBATAK is shown as silver for easy identification. It and the newer QRBATAK-A are annodized black as a finished product. |
Use with Guider Bracket
Although the QRBATAK-A can also be mounted to dovetail plates, we don’t recommend this option for critical guiding. Instead, we recommend attaching the QRBATAK-A directly to the imaging scope rather than an accessory plate, whenever possible. |
Use with Finder Bracket The QRBATAK-A will also allow you to use any Astro-Physics finder bracket (past or present) that utilizes the QRBASE, QRBASES QRBASES-A, orQRBASES adapters. When ordering, choose from the following:
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Baader T-2 Extension Tubes (BP25A, BP25B and BP25C)
The Baader T-2 Extension Tubes are available in three lengths: 40 mm (BP25B), 15 mm (BP25A) and 7.5 mm (BP25C). A combination of these extension tubes will be necessary when the 10 x 60 Baader Vario Finder is converted into its guidescope configuration. Depending on the back focus spacing of your autoguider camera, you will most likely need to use the BP25B and/or the BP25A extension tubes. We have found that the two combined provides the optimal spacing distance for the cameras that we use (your system may differ). |
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15mm T-2 Extension
40mm T-2 Extension
7.5mm T-2 Extension
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Optical Accessories
2" Advanced Convertible Barlow (BARADV)
Our Advanced Convertible Barlow has a unique design that provides several configurations to increase the focal length of your telescope. It was designed to match the characteristics of small and medium size CCD chips. It is also ideal for high-power visual observation and lunar-planetary-solar photography. This redesigned optic features a flatter field, allowing it to be used for deep-sky photography when increased magnification of smaller objects is desired.
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Features:
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The Barlow’s flat field is optimized for APS-C and smaller sensors (such as the 8300 and 3200 sensors). Using this Barlow with an f/8 refractor provides round stars over 90% of the field and over 80% of the field with an f/6.3 refractor. Please click this link for additional information and sample images taken with this fine optic. |
The Baader Planetarium Fluorite Flatfield Converter System (BPFFC) is another option for taking images at magnitudes up to 8x. The fully coated optics provide an apochromatic flat field over a 90 mm circle format. More information about this product is available clicking the thumbnail to the right or the links below. Baader Flatfield Converter Barlow Baader FFC Basic System |
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We have increased the versatility of our telecompressor (also called a focal reducer) by designing a variety of accessories for photographic, CCD and visual applications. The effective focal length will be approximately 0.75 times the focal length of the instrument, i.e. our f6 refractors will operate at a very fast f/4.5! Deep-sky objects are recorded on film in a fraction of the time needed at prime focus. In addition, you can more effectively capture a large object or cluster of objects with the telecompressor. For instance, if you photograph at prime focus with a 35 mm camera on a 130mm f/6 StarFire, you will achieve a 1.7 x 2.4 degree field. If you use the telecompressor, the field size increases to 2.3 x 3.3 degrees at f/4.5. This greatly increases the versatility of your refractor for imaging a wide variety of objects. |
This well-corrected accessory lens preserves the high contrast and superb
color correction of the main objective. While the telecompressor flattens
the field to a certain degree, you may still notice some slightly elongated
stars in the corners. This is less of an issue with CCD imaging when
the chip size is smaller than a 35 mm negative. For the very best edge
star images, we recommend the prime focus 2.7" or 4" field flatteners,
which have been specifically designed for each focal length of our StarFire
refractors. If you own one of our 175, 160, 155 or 140 StarFires and
plan to take CCD images, we suggest our dedicated CCD
Telecompressor Correctors that are optimally corrected for these scopes. Note: Celestron EdgeHD scopes recommend a 146 mm back spacing distance (reference Celestron Tech information). Contact Celestron for further information. In addition to our refractors, Astro-Physics focusers are featured in several popular Ritchey-Chretiens (the telecompressor produces very fine results with these scopes) and are available for telescope makers. The 6x7 Outer Bayonet Adapter (ADA2767), introduced in August, 2008 allows larger imaging platforms like the SBIG STL Series cameras or full frame DSLR's to be attached to the Photo-Visual Telecompressor without the vignetting effects of a 2" nosepiece or a T-ring and allow rotating the camera! You may prefer a sturdier cover than the included plastic plug. Astro-Physics also offers an optional aluminum cover that will accommodate this part, depending on your storage needs. Please review the information regarding the Threaded Cover for AP 2.7" Drawtubes and Accessories with 2.7" Female Threads (A1005). More information can be found on our Accessory Reference Chart for 2.7" Threaded Covers. Diagram and Magnification Info: Applications: The telecompressor is threaded for 58 mm filters. |
![]() Images Taken with the CCDT67
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Originally developed to tame the focal length of our 10" f/14.6 Mak-Cass, this telecompressor is optimized for scopes ranging from f/9 to f/18 focal ratio. The 2-element cemented design transmits close to 99% of the incoming light over the range of 420 to 700 nm. The focal length of the telecompressor optics is 12". For refractors, the field is compressed by 0.67x. If you have a moving mirror system, the native focal ratio will increase. This optic is not recommended for telescopes with f/ratios below about f/8-9. For faster instruments, we recommend the Photographic-Visual Telecompressor (27TVPH). The CCDT67 design allows full corner-to-corner illumination up to an 8300 or APS-C size chip with most catadioptric telescopes. This design does not add coma to the wavefront, and thus, can be used with all flat-field and coma-free telescopes such as Maksutov-Cassegrains, Schmidt-Cassegrains, Ritchey-Chretiens and refractors. The inherent resolution of the telescope is not compromised when using this compressor. Please review the exploded diagram to see how this item will fit into your imaging system. If you want a higher compression ratio, you can add one or more of the 2" Barrel Extension w/ 48 mm Threads (A3703) between the CCDT67 and the nosepiece of your camera. This has the advantage of inserting the CCDT67 forward in the light cone so that in-travel requirements are reduced. Please note that as you increase compression, you decrease the size of the image circle at the focus point. At 0.67x, the CCDT67 will have a 29 mm image circle. It will not cover a full-frame size chip.
To calculate the compression factor and coverage for your particular setup, please refer to our Telecompressor Spacing, Compression Calculation and Coverage document or to the CCDT67 & 27TVPH Telecompression Graph. We highly recommend our 2" Secure-Grip Nosepiece (AP16T) for your CCD camera. When used with the brass locking ring of most of our adapters, this unique barrel will seat your valuable CCD camera squarely and solidly into place. Even a single thumbscrew interface will be improved. Note: If you are using the older style thin 2" adapter (part # ADA2013), we suggest that you use the 2" nosepiece that came with your camera or the 2" nosepiece from Baader Planetarium (we offer as part #BP16). The current style 2" Thin Adapter (ADA20132) works perfectly with the AP16T. |
0.72x
Quad Telecompressor Corrector for:
** 130 StarFire GTX and EDFGT (with 3.5" Focuser) Refractors (QUADTCC-AP130)
** 140/160/180 Telescope Engineering Company Refractor (QUADTCC-TEC140/160/180)
Expand your field! Reduce your f/value, speeding up the collection of photons! And do it with pin-point stars all the way to the corners of your full frame 35 mm sensor! |
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The new Quad TCC (four element Telecompressor Corrector) when coupled with the Astro-Physics 130 Starfire GTX is an imaging machine at f/4.5 and a focal length of 585 mm. It covers an approximate 3.5 x 2.4 degree field when using a full frame 35 mm sensor and an amazing 3.5 x 3.5 degrees when using a 16803 sensor! There will be no need to mosaic your images, but when you do…Wow! Four carefully matched glass elements are carefully figured and then coated with the very latest multi-coatings to produce this optical wonder. All mechanical parts, including the covers, are CNC machined and black anodized with a lustrous finish. |
The Quad TCC takes advantage of our new 3.5” focuser to provide coverage of a full frame sensor. 130 Starfire EDFGT owners can celebrate with the knowledge that their 2.7” focusers can be upgraded with the 3.5” focuser and then also use the Quad TCC. |
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We believe in spreading the imaging fun around. The Quad TCC will also work with Telescope Engineering Company’s APO 140ED f/7 scope, making it a 700 mm, f/5 flat-field imaging scope! No fancy modifications are needed…simply attach our Drawtube Endcap (S35RFAA) to TEC’s Starlight Instrument focuser, then slip in the Quad TCC and you’re ready to go. The TEC 160 and TEC 180 scopes with the Starlight Instruments 3.5” focuser can also employ the Quad TCC (a different backfocus spacer will need to be used). The fun just goes on! |
QuadTCC above shown with scope Backfocus Spacer. | ![]() |
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The male threads are 3.270" x 16. | |
Field of View with 130 Starfire GTX (at f/4.5): |
Fully Illuminated Circle |
2.0” (50 mm) 18.0 x 13.5 mm 22.3 x 14.9 mm 36 x 24 mm 36.8 x 36.8 mm |
4.9° (294 min.) |
Field of View with TEC APO140ED (at f/5): |
Fully Illuminated Circle |
2.0” (50 mm) 18.0 x 13.5 mm 22.3 x 14.9 mm 36 x 24 mm 36.8 x 36.8 mm |
4.1° (245 min.) 1.5° x 1.1° (88 x 63 min.) 1.8 ° x 1.2° (110 x 73 min.) 3.0° x 2.0° (177 x 121 min.) 3.0° x 3.0° (177 x 177 min.) |
Scope | Part Code | Backfocus Spacer | Spacing with Bf. S. | Spacing without Bf. S. |
AP 130 GTX | QUADTCC-AP130 | 22.1 mm | 80.8 mm | 102.9 mm |
TEC 140 | QUADTCC-TEC140 | 18.3 mm | 80.8 mm | 99.1 mm |
TEC 160 | QUADTCC-TEC160 | 17.0 mm | 80.8 mm | 97.8 mm |
TEC 180 | QUADTCC-TEC180 | 16.0 mm | 80.8 mm | 96.8 mm |
Important Note: When purchasing the QuadTCC the proper length Backfocus Spacer is included for the scope specified. However, when ordering the QuadTCC for a TEC scope you will also need to order a Drawtube Endcap (S35RFAA) for the focuser (see part listing below). This only applies to the TEC focusers. This part is integral to the Astro-Physics 3.5" focusers and is not needed as a separate purchase. The S35RFAA screws onto the drawtube's 4.100" x 24 thread (same as Starlight Instrument's 3.5" focuser endcap thread). |
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Endcap (S35RFAA) for TEC Scopes and Starlight Instruments 3.5" focusers. | 3.5" Adapter for 4" Focusers (ADA435) |
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If you have multiple scopes from the list above and wish to purchase a Backfocus Spacer separately in order to use the QuadTCC on the different scopes, below are the spacers listed by length (reference the table above) and corresponding part number. | ||
Backfocus Spacer Length | Part Number | ![]() |
22.1 mm | A5020 | |
18.3 mm | A2680 | |
17.0 mm | A5022 | |
16.0 mm | A5023 |
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Optical Spacer Ring Set for Telecompressor Corrector (A5025SET) | |
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In most imaging setups it will not be necessary to modify the spacing distance. However, there may be some sensor/camera combinations that can benefit by making slight changes to this spacing. A set of three 1 mm thick spacer rings is being offered that can be used in special circumstances to modify the backfocus spacing of the Telecompressor Corrector. |
One can increase the spacing by adding one, two or three spacer rings to the rear threads of the Telecompressor Corrector. Reducing the distance is done by switching to a shorter Backfocus Spacer (22.1 mm, 18.3 mm, 17 mm and 16 mm are available). Adding rings to the 18.3 mm adapter will make the differences toward the 22.1 mm adapter. These rings are designed to slip over the 3.270" thread of the Telecompressor Correctors and CCD Field Flatteners. |
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How to determining how much spacing change is needed - shorter or longer. |
Adapters for CCD Field Flatteners and Telecompressor Correctors (ADATCC1, ADATCC2, ADATCC3, A3513-A, ADATCCEOS and ADATCCNIK) |
0.76x CCD Telecompressor Correctors
for the 175, 160, 155 and 140 StarFire EDF Refractors and Corresponding Adapters
Dedicated Telecompressor Correctors are available for the 160 f/7.5, 175 f/8 , 155 f/7 and 140 StarFire f/7.5 StarFire EDF refractors. They were originally designed with the requirements of CCD imaging in mind, however they can be used with any kind of camera including modern SLR and DSLR cameras and even video cameras as long as the proper adapter is employed. They were designed to use with the 4" Focuser. Please refer to the detailed information at the links below. | |
F/6.1
CCD Telecompressor Corrector for the 175 f/8 StarFire EDF (175TCC) F/5.7 CCD Telecompressor Corrector for the 160 f/7.5 StarFire EDF (160TCC) F/5.3 CCD Telecompressor Corrector for the 155 f/7 StarFire EDF (155TCC) F/5.7 CCD Telecompressor Corrector for the 140 f/7.5 StarFire EDF (155TCC) |
Adapters for CCD Field Flatteners and Telecompressor Correctors (ADATCC1, ADATCC2, ADATCC3, A3513-A, ADATCCEOS and ADATCCNIK) |
2.7" Prime Focus Field Flattener (67PF462, 67PF562, 67PF582, 67PF69, 67PF79)
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Our 2.7" Field Flattener can be coupled to a variety of different cameras for truly
superb photographs or images with your StarFire refractor. Each field
flattener is designed for a particular focal length for optimal results.
They are not interchangeable.
The backfocus spacing for these flatteners (as measured from the rear flange) is 3.4" +/- 1/10" (86.4 mm +/- 2.5 mm). The bayonet male thread size at the rear is 3.725" x 24. Use the bayonet locking ring to secure your camera into position after you have framed your image. This allows you to rotate the camera to achieve your desired composition. |
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Please choose the appropriate field flattener for your Astro-Physics refractor:
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Applications: CCD Camera - Choose the appropriate adapter A1260, A1261, A1262, A1263 or A1265 to space the field flattener properly with your CCD camera. For SBIG STL Series cameras we also offer the ADA671 and ADA672 Adapters which couple directly to the STL's accessory block for an unvignetted light path. |
3.5" Prime Focus Field Flattener for 130 StarFire GTX (13035FF)
The new 3.5” Field Flattener for the 130 Starfire GTX is a redesigned housing that utilizes the superb optics of the 67PF562. It provides pin point stars to the very corners of your CCD or DSLR sensor. The 130 GTX images at f/6.7 with the Flattener. It accommodates today’s largest sensors (even the KAF-50100). Conveniently, it uses the same camera adapters as the Quad TCC (and those of the flatteners and TCCs of the 160 and 175 Starfires). We also recommend Precise Parts for custom adapters for every camera and filter wheel combination. Machined aluminum covers are included. |
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Schematic showing Backfocus Spacer and Adapter spacing. | The backfocus spacing from the rear flange is: With Backfocus Spacer - 80.8 mm +/- 2.5 mm Without Backfocus Spacer - 102.9 mm +/- 2.5 mm |
Field of View with 130 Starfire GTX and 3.5" Field Flattener: |
Fully Illuminated Circle |
2.6” (65 mm) 18.0 x 13.5 mm 22.3 x 14.9 mm 36 x 24 mm 36.8 x 36.8 mm |
4.3° (256 min.) |
Adapters for CCD Field Flatteners and Telecompressor Correctors (ADATCC1, ADATCC2, ADATCC3, A3513-A, ADATCCEOS and ADATCCNIK) |
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CCD Field Flattener for the 175
and 160 StarFire EDF Refractors and Corresponding Adapters
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Dedicated field flatteners are available for the 160 f/7.5 and 175 f/8 StarFire EDF refractors. They were originally designed with the requirements of CCD imaging in mind, however they can be used with any kind of camera including modern SLR and DSLR cameras and even video cameras as long as the proper adapter is employed. They were designed to use with the 4" Focuser. Please refer to the detailed information at the links below. |
F/7.7
CCD Field Flattener for 160 f/7.5 StarFire EDF (160FF) F/8.3 CCD Field Flattener for 175 f/8 StarFire EDF (175FF) - included with purchase of the 175 f/8 StarFire EDF refractor |
Adapters for CCD Field Flatteners and Telecompressor Correctors (ADATCC1, ADATCC2, ADATCC3, A3513-A, ADATCCEOS and ADATCCNIK) |
Adapters for Optical Accessories
2" Barrel Extension w/ 48 mm Threads (A3703)
This 2" x ½" Barrel Extension is a more robust version of T-thread extension tubes. It uses 48 mm threads at both ends (female and male) instead of the smaller 42 mm T-threads. Its internal light baffles are painted flat-black to avoid reflections. Use more than one to increase spacing distance and/or telecompression in 1/2" (12.7 mm) increments. This extension has a net spacing distance of 0.5" (12.7 mm). |
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Threaded 2.7" Extension with Internal T-thread (A3511)
Realize the full potential of your Fluorite Flatfield Converter (BPFFC) or 2" Advanced Convertible Barlow
(BARADV) when imaging by using this extension. This 2.7" extension has a net spacing distance of 0.75" (19.05 mm). |
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Cover Set for Astro-Physics 2.7" Field Flatteners (CSET27FF)
For Astro-Physics customers who have already purchased our 2.7" field flatteners, we are now offering machined aluminum covers to protect their optics. These covers will fit any Astro-Physics 2.7" field flattener. This will replace the red plastic plugs that were previously shipped with all field flatteners. You do not need to purchase these covers separately if you are ordering a new field flattener. They have been included with all new 2.7" field flattener purchased since summer 2009. The set includes one each of the following: |
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This aluminum cover is felted along its inside edge. Order it to replace a red plastic plug or a cover that has been lost or damaged. Depending on your storage needs, it may also be used as a slip-on cover for any accessory with a 3.9" outer diameter, including the 2.7" to 6x7 Outer Bayonet Adapter (ADA2767). If you purchased a 2.7" field flattener that included red plastic plugs, this cover is available as part of a set along with the threaded cover you will need for the other side of your flattener. Review our information above regarding the Cover Set for Astro-Physics 2.7" Field Flatteners (CSET27FF). It is included with all new field flattener purchases, so there is no need to purchase any covers if you are ordering a flattener. Please note that this cover should be gently pulled to remove it from your field flattener and not "unthreaded." While attempting to unthread it, you will actually be unthreading the bayonet lock ring from the field flattener body. |
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This machined aluminum cover has a 2.7" female thread for attaching to the focuser side of any 2.7" Astro-Physics Prime Focus Field Flattener. Purchase as a replacement for a red plastic plug or a cover that may have been lost or damaged. If you purchased a 2.7" field flattener that included red plastic plugs, this cover is available as part of a set along with the felted cover you will need for the other side of your flattener. Review our information above regarding the Cover Set for Astro-Physics 2.7" Field Flatteners (CSET27FF). It is included with all new field flattener purchases, so there is no need to purchase any covers if you are ordering a flattener. This part may also be used on any adapter, extension, or accessory that has a 2.7" male thread. Wondering if this will work with a specific part? Review the Accessory Reference Chart for 2.7" Threaded Covers. |
This adapter greatly increases the versatility and functionality of your imaging system. It was designed to couple larger format CCD cameras like the SBIG STL series and full frame DSLR’s (such as Canon and Nikon) to focusers and accessories that have the female Astro-Physics 2.7" thread. These include all Astro-Physics focusers, any other focuser that has an adapter with our 2.7" female thread, large Celestron and Meade SCTs with our ADASCTLC27 and ADASCTLM27 adapters or the Photo-Visual Telecompressor (27TVPH). These are the advantages: | |
This adapter has a net spacing distance of 0.20" (5.08 mm). |
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The ADA2767 is black anodized, and the inner 2.7" clear opening has knife edge baffles that are painted flat black. The adapter is approximately 0.85" in overall length, but adds just 0.20" to the light path. Diagram and General Instructions for Use of the 2.7" to 6x7 Outer Bayonet Adapter (ADA2767): |
The most discriminating CCD imagers with large chips may wish to use our field flatteners for the best possible results at the edge of the field. These adapters will preserve the correct spacing from the field flattener to the focal plane of your CCD camera. Choose the correct length for your system. Spacing distance can be refined by adding one of our many Thread-on Extensions. For owners of the SBIG STL Series of large format CCD cameras, we suggest the special STL Series adapters (ADA671 & ADA672) below for both perfect spacing and minimal vignetting. Important: There are now a huge variety of CCD cameras, filter wheels and other accessories on the market, and all of them have different dimensions in terms of their optical backfocus or light path distance. Even different filter choices will affect the optical distance because of the indexing effect of the filter itself. It is important that you know the specifications of your own particular equipment before deciding on an adapter. The information below provides guidelines - NOT inviolable laws. |
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A1260 CCD Adapter to use our 2.7" or 4" Field Flattener with 2.7" accessories. It is generally used in combination with our 2.7" extensions to match spacing requirements for CCD cameras. ADA2003 or ADA20132 Thumbscrew Adapters can be used to accept the 2" nosepiece of cameras. (Originally intended to use with your SBIG ST-series CCD cameras with a gap of approximately 0.25" between the Color Filter Wheel and the camera.) This adapter has a net spacing distance of 0.47" (11.9 mm). |
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A1263 CCD Adapter to use our 2.7" or 4" Field Flattener with 2.7" accessories. It is generally used in combination with our 2.7" extensions to match spacing requirements for CCD cameras. ADA2003 or ADA20132 Thumbscrew Adapters can be used to accept the 2" nosepiece of cameras. This adapter has a net spacing distance of 0.62" (15.7 mm). |
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A1265
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A1262
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Adapters to Attach SBIG STL Series CCD to Astro-Physics 2.7" and 4" Prime Focus Field Flatteners
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STL to the 2.7" to 6x7 Outer Bayonet Adapter: Short - 1.58" (ADA671) and Long - 1.93" (ADA672)
These adapters were developed with four primary goals in mind:
Two versions were designed to connect your SBIG STL series camera to the Astro-Physics 2.7" and 4" Prime Focus Field Flatteners: |
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ADA671 - This shorter version, 1.580" in length, was designed specifically for the STL series cameras with the optional FW8-STL, 8-position color filter wheel attached. This preserves the critical spacing of our field flatteners with the larger 8-position wheel. This adapter has a net spacing distance of 1.58" (40.13 mm). |
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ADA672 - The longer version, 1.930" in length, is the adapter for the STL series camera with the standard 5-position color filter wheel. It places the STL’s CCD sensor at the perfect 3.4" distance from the field flattener for pinpoint stars across the big CCD chip. This adapter has a net spacing distance of 1.93" (49.02 mm). |
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These two adapters were designed to work with all of the 2.7" and 4" Field Flatteners that we have produced: from the Traveler’s 2.7" Field Flattener to the 206EDF’s big 4" model, with the exception of the field flatteners for the 175EDF and 160EDF which have their own separate adapters for the STL series cameras. Additional Applications: Even though these adapters were designed for use with the Astro-Physics Prime Focus Field Flatteners, they both can be used with the 27TVPH Telecompressor or in any light path which does not employ a field flattener, and does not, therefore, have rigid spacing requirements. If critical spacing will never be an issue (i.e. an SCT with the ADASCTLM27 or ADASCTLM27), you might be better off choosing the shorter adapter. It is usually easier to add extensions than to cut the length of your light path! Click here for detailed instructions on using these adapters. The adapters are machined from single pieces of aluminum for strength and rigidity and bolt directly to the STL camera’s accessory mounting surface. This allows removal of the 2" nosepiece, and the much larger opening of our adapter leaves the camera's own internal filters as the only possible source of vignetting on the edges of the CCD chip. Clever radius-cut keyhole slots at the bolt attachment positions allow you to safely attach the bolts to the STL first, and then mount the adapter and twist it into position. The ADA671 and ADA672 are precisely machined here in our own CNC facility and black anodized for a rich finish. The internal knife edge baffling is painted flat black to maximize contrast in your images. The ADA671 and ADA672 adapters each include four 6-32x1/2" socket head cap screws for attachment to the STL series camera. |
Adapter to attach QSI’s 500 and 600 series WSG Cameras to Astro-Physics
2.7" and 4" Prime Focus Field Flatteners (A3512-A)
This adapter is specifically designed to attach AP 2.7" and 4" Field Flatteners to QSI’s 500 and 600 series WSG medium format cameras and to maintain the critical spacing to the focal plane at the perfect 86.4 mm. It utilizes the larger QSI and SBIG STL 2.156" thread size in order to minimize vignetting when using fast focal ratio telescopes. (2" nosepieces and T-threads are often too restrictive for today’s larger sized detector chips when used with fast scopes.) The versatility of this adapter takes a quantum leap forward when paired with the 2.7" to 6 x 7 Outer Bayonet Adapter (ADA2767):
All the above options provide greater rigidity and less flexure than using a 2" nosepiece and its associated combinations. This adapter has a net spacing distance of 1.33" (33.73 mm). |
35 mm Camera Adapter with T-Ring to use with 2.7" and 4" Field Flatteners (67RT---)
Use this adapter with the 2.7" or 4" Prime Focus Field Flatteners to obtain the best possible results with your 35 mm camera - pinpoint from edge to edge. See how this part fits into your photographic system in the exploded diagram (PDF file). The interior is painted flat black and is threaded for 48 mm filters. |
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With T-ring |
Purchase the adapter with or without the T-ring. Note: The three dashes in "67RT---" are replaced by the three first letters of the camera's name. Please specify the T-ring that you wish to use. Order an extra T-ring if you have two cameras. This part can be used with 2.7" field flatteners shipped after May 1994 and 4" field flatteners from any year. If you have a field flattener that is an earlier model, please call. This adapter has a net spacing distance of 1.67" (42.3 mm) with the T-ring. |
Without T-ring |
Extensions that thread into our focuser drawtubes to use with our Telecompressor (27TVPH)
and the SBIG and Fingerlakes Instruments CCD cameras (A3502-A, A3503, and A3504-A)
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These extensions thread directly onto our 2.7" focuser drawtube or our 4" to 2.7" adapter and CCD adapters A1260, A1261, and A1262. Available in three sizes, these parts provide the distance needed to get the proper compression for your setup. More information is available by clicking on the individual part numbers listed below. If you are uncertain how to determine which length extension you need, we recommend you review our Telecompressor Spacing, Compression Calculation and Coverage document. Thread-on Extension for Astro-Physics Focusers - 0.60" (A3505) Thread-on Extension for Astro-Physics Focusers - 0.75" (A3503) Thread-on Extension for Astro-Physics Focusers - 0.90" (A3506) Thread-on Extension for Astro-Physics Focusers - 1.25" (A3504-A) Thread-on Extension for Astro-Physics Focusers - 1.75" (A3502-A) |
Canon EOS Wide-Mount Camera Adapter with Stainless Steel Bayonet (PFCLEOS)
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It is precision-machined aluminum and anodized black. The bayonet is machined stainless steel with both the body and the bayonet baffled and painted flat black on the inside. The bayonet provides precise and solid camera connection. |
Nikon Camera Adapter with Stainless Steel Bayonet (PFCLNIK)
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It is precision-machined aluminum and anodized black. The bayonet is machined stainless steel with both the body and the bayonet baffled and painted flat black on the inside. The bayonet provides precise and solid camera connection. |
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35mm Camera Adapter with T-Ring (PFCT- - -)
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(PFCT - - -, substitute 3 letters in place of the dashes to indicate t-ring) Our camera adapter allows you to attach your 35 mm camera to any focuser that accepts 2" slip-in accessories. It is machined of aluminum, black-anodized and the inside is painted flat black. The I.D. of the opening where your camera attaches is 1.52" (38.6 mm) (some other camera adapters have a thick wall, which reduces the opening to your camera). The camera adapter is threaded for the popular 48 mm filters. |
Note the tapered 2" barrel. When used with our brass locking ring (or any locking ring clamp), this unique barrel will seat your valuable camera squarely and solidly into place. Even a single thumbscrew interface will be improved. Purchase the adapter with or without a t-ring. If you order a T-ring, the three dashes in the part number will be replaced by three letters, i.e. PFCTNIK if a Nikon T-ring is included. Please specify the T-ring that you wish to use. Order an extra t-ring if you have two cameras. This adapter has a net spacing distance of 1.35" (34.3 mm) without T-ring. |
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Astro-Physics Eyepiece Projection Camera Adapter is a two-part adapter. Use this unit with your film camera or DSLR to achieve higher powers and closer images of an object. It is particularly useful for photographing the moon or planets. This adapter can also be used in conjunction with a small chip CCD camera when attached to the camera’s T-thread. |
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The eyepiece projection unit accommodates 1.25" eyepieces with maximum eyepiece housing height of 2.25" and a 1.5" maximum outer diameter. Shorter eyepieces with wider outer diameters may also fit due to the gradual taper of the internal diameter of the unit, from 1.7" to 1.52." Because of the various different eyepieces currently on the market, we are unable to list specific eyepieces that will or will not work with this unit. Some experimenting may be required! Available as an individual part or pre-assembled with your camera-specific T-ring. |
Baader Protective T-Ring with 2" Nosepiece for Canon EOS
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The Baader Protective T-Ring allows Canon EOS cameras to attach to standard 2" eyepiece holders. It is optimized for full-frame sensor cameras (such as the Canon EOS 5D), but can be used with any EOS camera. One of the unique features of this “T-ring" is that it accepts internal filters (optional). Baader unmounted 50.4 mm or 50.8 mm and Baader low-profile 2" mounted filters can be installed internally. Please see this link for more information. |
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Canon EOS Wide-Mount Camera Adapter with Stainless Steel Bayonet for Prime Focus Field Flatteners (67RLEOS)
Designed to be used with: Current 2.7” Prime Focus Field Flatteners (67PF462, 67PF562 and 67PF582) and previous 2.7” and 4” Prime Focus Field Flatteners (67PF69, 67PF79 and S155EDFFF)
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This DSLR Camera Adapter for Canon EOS cameras with its large 1.875" (47.6 mm) inside diameter bayonet minimizes vignetting on full frame sensors by eliminating the restrictive 1.5" (38 mm) diameter standard T-thread interface. Since the introduction of Canon’s full 35 mm frame DSLR’s, people have been asking for a solution to the vignetting caused by the small clear aperture of the standard T-ring interface that is universally used to connect telescopes to DSLR cameras. This was especially true for Astro-Physics telescope owners who also had either our 2.7" or 4" Field Flatteners. What good were pinpoint stars to the edge of a wide field when the edge of that field was darkened by the T-ring’s vignetting effect? So, in keeping with our commitment to imagers, we introduced a solution! | ![]() |
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A 48 mm internal thread allows the use of a filter in the optical path; however, double-stacking is not possible when used with a flattener. The optical section of the 2" Advanced Convertible Barlow (BARADV), along with the 2" Barrel Extension w/ 48 mm Threads (A3703) can utilize these internal threads for a 2x magnification with central flat field (flattener not used) when used with an APS-C size sensor. This configuration requires using the 2.7" to 6x7 Outer Bayonet Adapter (ADA2767). |
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This adapter has a net spacing distance of 1.67" (42.4 mm). The spacing distance from the 48 mm internal threads (when using a BARADV or CCDT67) is 1.35" (34.4 mm). Note: If you received your 2.7" Field Flattener prior to May 1994, you will need new aluminum parts to use this adapter. Please call Astro-Physics for details. |
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Nikon Camera Adapter with Stainless Steel Bayonet for Prime Focus Field Flatteners (67RLNIK)
Designed to be used with: Current 2.7” Prime Focus Field Flatteners (67PF462, 67PF562 and 67PF582) and previous 2.7” and 4” Prime Focus Field Flatteners (67PF69, 67PF79 and S155EDFFF)
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This DSLR Camera Adapter for Nikon cameras with its enlarged inside diameter forward of the Nikon bayonet helps minimize vignetting on full frame chips. The limitation is only the camera body’s opening. The adapter body is precision-machined aluminum and is anodized black. The bayonet is machined stainless steel, and both the body and the bayonet are baffled and painted flat black on the inside. The adapter was developed to be used exclusively with 4" and 2.7" Astro-Physics Prime Focus Field Flatteners. (Please note that the Starfire 175EDF, 160EDF and 130GTX CCD Field Flatteners and Telecompressor Correctors have their own large diameter EOS Adapter, the ADATCCNIK). |
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A 48 mm internal thread allows the use of a filter in the optical path; however, double-stacking is not possible when used with a flattener. The optical section of the 2" Advanced Convertible Barlow (BARADV), along with the 2" Barrel Extension w/ 48 mm Threads (A3703) can utilize these internal threads for a 2x magnification with central flat field (flattener not used) when used with an APS-C size sensor. This configuration requires using the 2.7" to 6x7 Outer Bayonet Adapter (ADA2767). |
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This adapter has a net spacing distance of 1.57" (39.9 mm). The spacing distance from the 48 mm internal threads (when using a BARADV or CCDT67) is 1.26" (31.9 mm).Note: If you received your 2.7" Field Flattener prior to May 1994, you will need new aluminum parts to use this adapter. Please call Astro-Physics for details. |
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Thread this adapter into place, then use the ring shown on the right-hand side of the adapter to lock your camera into position after you have framed your image. This allows you to rotate the camera to achieve your desired composition. Please note: This adapter uses the Pentax 6x7 INNER bayonet and will only attach to a Pentax 6x7 camera. This adapter can NOT be used with our CCD adapters (A1260, A1261, A1262, A1263, & A1265); with our STL series adapters (ADA671 & ADDA672); or with our SLR camera adapters for the field flatteners (67RLEOS, 67RLNIK or 67RTxxx). |
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Our 2" adapter with brass locking and three thumbscrews is an essential component to any setup. This adapter is included with all of our telescopes and focuser units. Read more by clicking here. |
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Our 2"/T-2 Secure-Grip Nosepiece
for CCD Cameras, Baader Planetarium Mark V Binocular Viewer
or any item with T-2 threads. This nosepiece features a design to ensure safety and orthogonality. Attach it to your CCD camera, insert the nosepiece into your
2" adapter and tighten the thumbscrew. The brass locking ring will seat
your valuable CCD camera (or other valuable accessory) squarely and solidly
into place. The nosepiece has 48 mm filter threads and the interior is painted
flat-black. It is compatible with all compression/locking rings of which we are aware. It is not recommended when using our
older style 2" Thin Adapter ADA2013 (or
prior version ADA201). When using these items, we suggest the BP16 nosepiece. The current style 2" Thin Adapter ADA20132 was specifically designed to work perfectly with the AP16T. October 2017: current profile introduced. |
To see the nosepiece as used with a CCD camera, review the exploded diagram. If you own an Astro-Physics focuser, you also may wish to consider our 2" Adapter (ADA2003A) that features 3 locking screws. The combination of these two accessories will redefine "rock solid." This nosepiece has a net spacing distance of 0.13" (3.2 mm). |
2" Nosepiece with 2.156" Threads (A2558)
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The A2558 2" Nosepiece is similar to our classic AP16T 2"/T-2 Nosepiece, but with 2.156" threads for QSI and SBIG CCD Cameras. This nosepiece features a tapered profile that will provide the most robust attachment possible. Attach it to your CCD camera, insert the nosepiece into your 2" adapter and tighten the thumbscrews. The brass locking ring will seat your valuable CCD camera squarely and solidly into place. The nosepiece has 48 mm filter threads and the interior is painted flat-black. It is compatible with most compression locking rings. However, it is not recommended for our 92 mm f/5 or f/7 Stowaway, or when using our older style 2" Thin Adapter ADA2013 (or prior version ADA201). When using these older designs, we suggest the BP16 nosepiece. The current style 2" Thin Adapter ADA20132 will work perfectly with the A2558 nosepiece. |
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Related Photographic / Imaging Accessories
Losmandy Three-Axis Camera Adapter (LMDVCM2)
The Losmandy Three-Axis Camera Adapter is a very robust system for attaching your camera to a D-style (or V-style) dovetail plate. By utilizing a dovetail plate on the top of your scope rings you will be able to aim your camera in almost any direction. The adapter allows +/- 45 degrees of tilt and a full 360 degree rotation. No tools are required. Take the wide field constellation photos that you’ve always wanted and image the Milky Way in its splendor!
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Gelatin Filter Holder for 2.7" Field Flattener (27GEL1, 27GEL2)
Gelatin Filter Holder for 4" Field Flattener (40GEL1)
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These two-piece filter holders were designed to hold gelatin filter sheets for deep-sky, tricolor photography. Purchase gelatin filter sheets from a camera store, cut into a circle slightly larger than the opening (be sure to allow enough material to secure the edges) and install. We suggest that you purchase a separate filter holder for each color filter that you plan to use. Placement of the filters is shown in the exploded diagram (PDF file). Read hint for viewing this two-page diagram. 27GEL2 - Fits all current field flatteners and any shipped after May 1994. Clear aperture of the 2.7" filter is 2.35" (60 mm). 27GEL1 - If you have an earlier model (prior to May 1994), we offer part # 27GEL1 with a slightly different thread. 40GEL1 - 4" version designed to fit 4" Field Flatteners. |
Copyright © 2012, Astro-Physics, Inc.
- All Rights Reserved
This page was last modified:
December 14, 2018
Astro-Physics,
Inc.
11250 Forest Hills Road, Rockford, IL 61115, U.S.A.
Phone: 815-282-1513 Fax: 815-282-9847