Some of these links will take you to different pages, others will link further down this page.
Using the PDFs below
10 x 60 Vario-Finder with Quick Release Guider Bracket Kit (1060VGKIT)
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 Superstar, or a heavy-weight, such as the SBIG ST-402, this Guider Bracket will help you master autoguiding.
It is recommended that you use guide cameras with 7.4 micron pixels or smaller for best performance.
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.
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 interferance.
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 image to the right shows the SBIG ST-i used as a guidescope camera. It is a very light weight camera configuration.|
The image to the left shows a heavier SBIG ST-402 camera being used as a guide camera. Inspite of the weight, the Guide Bracket rigidly supports the drawtube without flexure.
Vario Finder and Guider Bracket Kit includes:
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 any Losmandy D-style dovetail plate should these be necessary.
Weight: 9.9 oz. (.28 kg)
Base for Quick Release Guider Bracket (QRBASEG)
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:
Although we assemble the bases for right-handed use, you can easily move the stop screw to the opposite position and rotate 180° for left-handed people. Additionally, we have provided a central locking screw hole so that our traditional finder brackets can be used with this base. The second set of attachment holes are provided for shifting the base forward or backward as needed.
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 interferance.
The mounting hole spacing is approximately 1 3/8” (34.9 mm) side-to-side and uses 10-32 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).
Weight: 4.4 oz. (.13 kg)
Takahashi Adapter for Astro-Physics Quick Release Bases (QRBATAK)
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.
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:
Photo shows the QRBATAK and Guider Bracket mounted on a Takahashi FSQ-ED. Note: The QRBATAK is shown as silver for
Use with Guider Bracket
Note: some Takahashi refractors may require an additional user-supplied 10 mm thick spacer.
Although the QRBATAK can also be mounted to dovetail plates, we don’t recommend this option for critical guiding. Instead, we recommend attaching the QRBATAK directly to the imaging scope rather than an accessory plate, whenever possible.
|Use with Finder Bracket
The QRBATAK will also allow you to use any Astro-Physics finder bracket (past or present) that utilizes the QRBASE, QRBASES or QRBASES-A adapters. When ordering, choose from the following:
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).
15mm T-2 Extension
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.
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.
|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
|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
Telecompressors that are optimally corrected for these scopes.
Two additional adapters released in 2007 and 2008 respectively have greatly increased the versatility of this Photo-Visual Telecompressor. The 2.7" Adapter that Threads onto the 3.25" Rear Cell of Larger Meade SCT's (ADASCTLM27), introduced in July, 2007 now makes this telecompressor available to owners of larger Meade SCT's. 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.
The focal length of the Photo-Visual Telecompressor is 27.6" (700 mm). In order to obtain approximately 0.75x, please refer to the exploded diagram for various configurations. Although not shown on the diagram, the telecompressor is threaded for 58 mm filters. 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.Applications:
35 mm Camera - Our Prime Focus Camera Adapter PFCT--- and your favorite 35 mm camera will produce very fine images in no time at all. It is best to use the Astro-Physics Camera Adapter since the length is appropriate to achieve approximately 0.75x for optimal results. If you desire a bit less compression, use our 2"/T-2 Tapered Nosepiece (AP16T) in place of the Prime Focus Camera Adapter for closer to 0.8x compression.
CCD Camera - Choose the appropriate adapter (A3503, A3504-A or A3502-A) to space the telecompressor properly with your CCD camera for up to 0.75x compression.
Pentax 6x7 Camera - For a 2" fully illuminated circle on 6x7 film (results in approximately 55% more field than 35 mm film!), a special camera adapter (ADA67P) interfaces with the Pentax 6x7 medium-format camera.
Visual - Slip in a 2" diagonal, such as our MaxBright Diagonal (PMDMAX), with most eyepieces (some eyepieces may not focus). While it is fun to use the telecompressor in this manner, your best wide field results will be obtained with a high-quality eyepiece rather than a telecompressor/eyepiece combination.
Astro-Physics Photo-Visual Telecompressor - We suggest that you review this exploded diagram, in PDF format, showing the telecompressor with a variety of accessories. Read hint for viewing this two-page diagram. We also recommend that you review our Telecompressor Spacing, Compression Calculation and Coverage document - PDF format - before trying to assemble an image train.
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.
Images Taken with the CCDT67
|Originally developed to tame
the focal length of our 10" f/14.6 Mak-Cass, this telecompressor
will provide full coverage of the ST10E chip with 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 (when using a Color Filter Wheel). 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/9.
For faster instruments, we recommend the Photographic-Visual
The design allows full corner-to-corner illumination of the ST-10 and ST-8300 chips 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, but do not use the color filter wheel, 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 foward in the light cone so that in-travel (backspacing) requirements are reduced. An alternative is to use T-2 extension rings that we offer from Baader Planetarium. Threading the 15mm T-2 Extension Ring (part # BP25A) and 7.5 mm Extension Ring (part # BP25C) between the CCD camera and the nosepiece. will approximate the spacing of a color filter wheel. You can also experiment with a single extension or other combinations. 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 cover the chip of the ST-10 and ST-8300. It can never cover the chip of an STL series camera or the newer large size digital SLR chips, because its clear aperture is no larger than their CCD chips.
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.
This image of the Ring Nebula was taken with the Astro-Physics 10" f'/14.6 Maksutov-Cassegrain and the CCD Telecompressor using an ST10E with the color filter wheel. Once you receive your CCD Telecompressor, we invite you to submit your images so that they can be featured here, all scopes will be welcome.
We highly recommend our 2" Tapered 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.
|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.|
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, ADATCCEOS, A3513)
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2.7" Prime Focus Field Flattener (67PF462, 67PF562, 67PF582, 67PF69, 67PF79)
|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 this flattener (as measured from the rear flange) is 3.4" +/- 1/10" (86.4 mm +/- 2.5 mm). This is true for all 2.7" and 4" field flatteners that we have produced except for the 160 Field Flattener (160FF).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.
choose the appropriate field flattener for your Astro-Physics refractor:
67PF462 - 105 Traveler
67PF562 - 130 StarFire EDFS, 130 StarFire EDF Gran Turismo
67PF582 - 140 f/7.5 StarFire EDF, 130 StarFire EDT, 155 StarFire EDFS, Star130ED, Star12ED, 5" f/8 StarFire, 5" f/8 Standard
67PF69 - 155 StarFire EDT, previous 6" f/9 and Star155ED
67PF79 - 180 StarFire EDT, 7" f/9 StarFire
35 mm Camera or 35 mm format DSLR - use 67RT-- adapters (specify the t-ring that you need) to interface with the field flattener for optimum results in 35 mm film formats. Click here to see the field flattener with our 2.7" focuser and 35 mm camera. For full frame Canon DSLR's, we also offer the Large 1.875" diameter SLR Adapter with Canon EOS Bayonet (67RLEOS).
CCD Camera - Choose the appropriate adapter A1260, A1261 or A1262 to space the field flattener properly with your CCD camera. For 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.
The S155EDFFF 4" Prime Focus Field Flattener was originally produced for the 155 f/7 StarFire EDF with its 4" focuser and was included with those instruments. It is now available as an accessory for owners of the 155 f/7 StarFire EDFS version who have upgraded their 2.7" focusers to the 4" model. It is also the perfect Field Flattener for the 140 f7.5 StarFire EDF when purchased with the optional 4" focuser (140EDF4). These 4" Prime Focus Field Flatteners come with two beautifully machined, felt-lined aluminum covers to protect the valuable optics inside.
This optical marvel was originally designed to take full advantage of the medium format Pentax 6x7 camera, and will provide pinpoint stars all the way to the edge of its field with no vignetting! It is perfect for today's larger CCD cameras as well. We also offer an adapter that allows this Field Flattener to be used with the more conventional SLR's - either 35 mm or digital (including a larger clear aperture version for the full format Canon EOS cameras). The S155EDFFF flattens the field across a full 4" circle without significantly changing the native focal ratio of the telescope - The 155 f/7 operates at about f/7.3 while the 140 f/7.5 will operate at f/7.8.
The backfocus spacing for this flattener (as measured from the rear flange) is 3.4" +/- 1/10" (86.4 mm +/- 2.5 mm).
In the past, most CCD cameras had to be attached using a 2" adapter and nosepiece - see image below left - but we now have two direct adapters for the larger format STL series of cameras (ADA671 & ADA672) that are similar to the ones available for the 155TCC Telecompressor Corrector, the other outstanding 4" imaging accessory for both the 155 f/7 and 140 f/7.5 StarFire EDF instruments.
Diagrams and Instruction Sheets:
RIGHT - The S155EDFFF shown with its beautifully machined covers.
NEAR RIGHT - The draw tube side of the S155EDFFF.
FAR RIGHT - The S155EDFFF shown with the bayonet ring removed.
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.
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, ADATCCEOS and A3513)
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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).
Threaded 2.7" Extension with Internal T-thread (A3511)
Realize the full potential of your Fluorite Flatfield Converter (BPFFC) or 2" Convertible Photo-Visual Barlow (BARCON) when imaging by using this extension. The internal T-thread on this extension allows you to attach your BPFFC, BARCON or other accessory with male T-threads INSIDE the 2.7" extension tube. In this way, the camera, filter wheel, off-axis guider, and/or other accessories are all supported by the much more robust and rigid 2.7" tube system, and the Barlow only needs to support its own weight inside the extension tube. This is particularly important when imaging at some of the higher magnification factors achievable with the BPFFC where over a foot of extension may be used between the Barlow optic and the focal plane. The maximum OD of the T-thread accessory is 2.5". Please see this A3511 System Chart for component options.
This 2.7" extension has a net spacing distance of 0.75" (19.05 mm).
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:
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.
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 (like those by Canon) 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 Meade SCTs with our ADASCTLM27 adapter or the Photo-Visual Telecompressor (27TVPH). These are the advantages:|
This adapter has a net spacing distance of 0.20" (5.08 mm).
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.
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).
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).
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 the Color Filter Wheel closely coupled to the CCD camera.)
This adapter has a net spacing distance of 0.72" (18.3 mm).
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:
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 would also be the adapter of choice for use with an AO-8 or AO-L Adaptive Optics Unit, along with the ADA2767 adapter, but note that the AO-8 and the AO-L can NOT be used with a field flattener. See Additional Applications below.)
This adapter has a net spacing distance of 1.58" (40.13 mm).
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).
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.
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), 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! This is especially true when used with the SBIG AO-8 or AO-L, as they add significant light path distance already.
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 or the AO-8 or AO-L Adaptive Optics Units.
Adapter to attach QSI’s 500 and 600 series WSG Cameras to Astro-Physics
2.7” and 4” Prime Focus Field Flatteners (A3512)
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 adapter plate with the 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---)
| With T-ring
(67RT - - -, last 3 letters indicate t-ring)
This part can also be used with the 2.7" to 6x7 Outer Bayonet Adapter (ADA2767) if you wish to do so, although the required T-ring for camera attachment will not maintain the ADA2767's wide open light path.
Purchase the adapter with or without the T-ring. T-rings thread easily into place. If you order your camera adapter with a T-ring, the three dashes in the part number will be replaced by three letters, i.e. 67RTNIK if a Nikon T-ring in included. 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.
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)
|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)
|This finely-machined STL Camera Adapter
was designed for the 3.5" Focuser of the 305 mm f/3.8 Riccardi-Honders
Astrograph. It connects securely to the face plate of SBIG STL cameras
using the included four 6-32 x 1/2" Sockethead Cap Screws. It then
is inserted into the Riccardi-Honders focuser and the focuser's three thumb
screws tightened, anchoring securely into the circular dovetail of the
The new circular dovetail style was developed to not only provide a secure method of attaching the extra weight of modern CCD camera systems, but to also provide an easy way to rotate them to any position and then to flawlessly lock attachments with zero tilt.
Unlike the Astro-Physics Prime Focus Field Flatteners, there are no critical spacing requirements with this scope.
This adapter has a net spacing distance of 1.41" (35.92 mm).
|(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 the T-ring.
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.
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.
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Baader Protective T-Ring with 2" Nosepiece for Canon EOS
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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SLR Camera Adapter with Large 1.875” Diameter Canon EOS Bayonet (35mm and digital) (67RLEOS)
This SLR Camera Adapter for Canon auto-focus 35mm and digital EOS SLR cameras with its large 1.875" (47.6 mm) inside diameter EOS bayonet minimizes vignetting on full frame chips and on 35 mm film by eliminating the restrictive 1.5” (38 mm) diameter standard T-thread interface. Since the introduction of Canon’s full 35 mm frame digital SLR’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 SLR 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!
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 Astro-Physics 2.7" and 4" Prime Focus Field Flatteners (except the 160FF - Please note that the 160 Field Flattener has its own large diameter EOS Adapter, the ADATCCEOS). The 67RLEOS will position the chip (or film) at the correct distance from the Field Flattener optics for pinpoint stars. A 48 mm internal thread allows the use of a filter in the optical path; however, double-stacking is not possible.
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).
The versatility of this adapter took a quantum leap forward with the introduction of the 2.7" to 6x7 Outer Bayonet Adapter (ADA2767). With the 67RLEOS and the ADA2767 together, full frame Canon EOS SLR's can produce unvignetted, easily framed images with a wide variety of configurations.
Please note: this adapter can NOT be used with Canon manual-focus 35 mm cameras (series FD and earlier lenses). For imagers with the 160 Field Flattener and the 160 and 155 Telecompressor Correctors, we also offer the ADATCCEOS , SLR Camera Adapter with Large 1.875" Diameter Canon EOS Bayonet.
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, 67RTxxx etc.).
|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.
|2"/T-2 Tapered Nosepiece for SBIG CCD Cameras, SBIG STV, Baader Planetarium Mark V or Giant Binocular Viewer or any item with T-2 threads. This nosepiece features our unique tapered profile. 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 I.D. is painted flat-black. Compatible with most compression/locking rings that we know of. Not recommended for our 92mm f/5 or f/7 Stowaway or 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.|
To see the nosepiece as used with a CCD camera, review the exploded diagram. Note that this is a PDF file. Read hint for viewing this two-page diagram. If you own an Astro-Physics focuser, you also may wish to consider our 2" Adapter (ADA2003) that features 3 locking screws. The combination of these two accessories will redefine "rock solid."
This nosepiece has a net spacing distance of 1.15" (29.21 mm) when used with the CCDT67.
|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.
|Use this professionally fabricated aluminum bracket to attach a Technical Innovations Robo-Focus driver to all modern Astro-Physics focusers.
For more information and pictures, please use the following link.
Protect and carry your 80 mm x 900 mm guidescope (or an even larger telescope without rings) with this handy case. We designed it to allow our 4.4" guidescope rings to remain in position on the scope. You don’t have to take them off! The case measures 39.25" x 9.5" x 10.25" (exterior) and is built like our refractor cases of quality plywood with a grey vinyl exterior. The inside dimensions are 36.5" x 7" x 6.25" and is lined with 1" foam. It is an essential addition if you transport your guidescope or wish to protect another of your telescopes. [Unfortunately, the guidescopes are no longer available.]
Note that this case would be an excellent carry case for protecting many different telescopes in your collection.
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- All Rights Reserved
This page was last modified: December 5, 2013
11250 Forest Hills Road, Rockford, IL 61115, U.S.A.
Phone: 815-282-1513 Fax: 815-282-9847