Celestron
Celestron T-Adapter For Schmidt-Cassegrain... $45.95
This sturdy metal T-Adapter is the accessory of choice if you’d like to attach an SLR or DSLR camera to the rear cell threads of a Schmidt-Cassegrain telescope for prime focus photography. Description To get started, you’ll need the appropriate T-Ring for your camera body (#93402 for Nikon & #93419 for Canon EOS). Remove the lens from your camera and attach the T-ring in its place. Since the T-ring is camera-brand specific, it will snap right on just like a lens. Next, remove the diagonal and visual back from the rear cell of your telescope. Screw the Celestron T-Adapter onto...
Sky Instruments
Antares 2" Direct Adapter To T-Ring (DP2) $39.95
Threaded for use with 2 inch filters, direct adapter to T-ring. Use any piece of equipment with 42mm female t-threads in your 2 inch focuser. 
Sky-Watcher
Sky-Watcher Canon EOS M48 Camera Adapter (... $40.00
Description Designed for attaching a Canon DSLR camera to any of the Sky-Watcher 0.85x Focal Reducer/Correctors. M48 rings are used for larger format imaging. These are different than the standard T-Thread and are not suitable for use on our Collapsible Dobsonian line. M48 rings are to be used on the Esprit and ProED series when using the dedicated field correctors. Also for use with the Celestron T-Adapter Edge HD 9.25, 11, 14 48mm and other applications requiring a 48mm t-ring.  
Tele Vue Optics
Tele Vue 1.25" PMT T-Ring Adapter (PTR-1250) $69.00
This threaded adapter ring replaces the 1.25" eyepiece holder on the TeleVue Powermate 2.5X 1.25" (and other 1.25" Powermates). The adapter threads directly onto the chrome barrel in place of the eyepiece holder. The adapter allows a T-ring (sold separately) to be attached so you can connect your 35mm camera directly to the Powermate.
Celestron
Celestron T-Adapter 48mm for EdgeHD 9.25",... $98.95
The 48mm T-Adapter is the accessory of choice if you’d like to attach your full frame DSLR or astronomical camera to a Celestron EdgeHD optical tube. With DSLR CCD chips getting larger, Celestron created the 48mm T-Adapter to reduce vignetting and provide a larger light path to your camera’s sensor, producing exceptional astrophotos. Description The standard T-Adapter for EdgeHD 9.25", 11", and 14" comes with a 42mm T-Thread for a 42mm T-Ring. This smaller 42mm T-Adapter truncates the light cone coming from the back of the EdgeHD optical tubes, which creates vignetting in the corners of full frame imaging sensors....
Orion Telescopes USD
Orion Wide M48 T-Ring For Canon EOS Camera... $36.39
This T-ring, designed to fit Canon EOS cameras, features M48 (48mm x 0.75) threads. Description A wide T-ring converts a DSLR camera body's bayonet mount to a wide-format (M48), female T-thread, allowing attachment of the camera to accessories such as field flatteners, reducers, and spacer rings that utilize the M48 thread. Wider than standard M42 T-rings, this T-ring reduces vignetting, especially in full-frame (35mm format) cameras. Length (thickness) of the T-ring is 10.9mm. Made of machined aluminum and black anodized. Quick Overview This larger than standard size, wide 48mm diameter T-ring supports full 35mm format Canon cameras. Not compatible with...
Tele Vue Optics
Tele Vue 2" T-Ring Adapter For 2X Powermat... $78.00
The PTR-2200 t-ring adapter allows you to connect the TeleVue 2" 2X Powermate to a camera t-ring for double magnification in prime focus photography.Remove the eyepiece holder of the PowerMate by unscrewing the top half of the PowerMate from the lower half (where all the optics are placed). Then screw on the T-ring adapter and your camera t-ring. The PowerMate, with camera attached, is then ready to insert into the focuser of your telescope.
Celestron
Celestron T-Adapter EdgeHD 8 (93644) $53.95
T-Adapter for 8” EdgeHD optical tube threads onto the rear cell. Description This T-Adapter allows you to attach your 35 mm DSLR camera to the prime focus of your EdgeHD telescope. This arrangement is used for terrestrial photography and short exposure lunar and planetary photography. It can also be used for long exposure deep-sky photography when using a separate guidescope. Both a T-Adapter and T-Ring are required to mount a DSLR camera to your instrument.
Celestron
Celestron Universal Barlow and T-Adapter 1... $91.95
This 1.25” accessory can be used three ways: as a 2X Barlow for visual use, as a prime focus T-adapter, or as a “Barlowed” T-adapter for double the magnification and the benefit of extra inward focus travel. Description The Universal Barlow & T-Adapter can be used as a 2X Barlow right out of the box. Insert any 1.25” eyepiece into the chamber and you’ll enjoy double the magnification, while retaining all the eye relief of the inserted eyepiece. The Celestron Universal Barlow & T-Adapter can also be used for prime focus photography, which means you use the telescope as a...
Sky Instruments
Antares 1.25" Photo Adapter (DP1) $19.95
The Antares 1.25" Photo Adapter allows prime focus photography by attaching your SLR or DSLR to a 1.25" focuser or 1.25" diagonal. A T-ring for your camera is required to connect the photo adapter to the camera. DP1 adapts your 1.25" focuser or diagonal directly to M42 T-Thread. Threaded for filters.  
Orion Telescopes USD
Orion Wide M48 T-Ring For Nikon Cameras (0... $36.39
This wide-format T-ring is not compatible with standard T-threaded accessories. For use with wide-format 35mm cameras, and 48mm wide-format T-threaded accessories only. Description A wide T-ring converts a DSLR camera body's bayonet mount to a wide-format (M48), female T-thread, allowing attachment of the camera to accessories such as field flatteners, reducers, and spacer rings that utilize the M48 thread. This T-ring, designed to fit Nikon F-mount cameras, features M48 (48mm x 0.75) threads. Wider than standard M42 T-rings, this T-ring reduces vignetting, especially in full-frame (35mm format) cameras. Length (thickness) of the T-ring is 8.1mm. Made of machined aluminum and...
Celestron
Celestron SCT to 2" Adapter (93661) $36.95
This sturdy, high-quality adapter provides a solid connection between your Schmidt-Cassegrain or Maksutov-Cassegrain telescope and 2” accessories without any special threaded 2" diagonal. This accessory makes it possible to maximize your views through your telescope with your standard 2” diagonal, eyepieces, and other accessories (like photo adapters) allowing you to connect a camera for astroimaging. Description The adapter offers an ultra-secure threaded connection to your telescope. On the other side, a brass compression ring provides a strong grip on eyepieces accessories without scratching or denting their barrels. To tighten the ring around the accessory, just adjust the set screw. With...
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Orion Telescopes USD
Orion T-Ring For Canon EOS Cameras (05224) $27.29
A T-ring converts a DSLR camera body's bayonet mount to a female T-thread, allowing attachment of the camera to a T-Adapter, a telescope field flattener, coma corrector, or other "T" threaded camera accessory. Description This T-ring, designed to fit Canon EOS cameras, features standard M42 (42mm x 0.75) T-threads. Length (thickness) of the T-ring is 9.8mm. Made of machined aluminum and black anodized. Specification Overview Threaded ring couples Canon EOS camera body to standard T-thread on most camera adapters Ring attaches securely to Canon EOS DSLR or SLR camera body and provides a T-thread interface Couples Canon EOS camera body...
Tele Vue Optics
Tele Vue Standard T-Ring Adapter For 2.4" ... $47.00
Standard T-Ring Adapter for 2.4" provides a standard T-ring thread to attach your camera too. Recommended for cameras with APS-size or smaller chips. Takes up 0.26" / 6.6mm of path length.
Tele Vue Optics
Tele Vue 2" T-Ring Adapter for 4x Powermat... $78.00
This threaded adapter ring replaces the 2" eyepiece holder on the TeleVue Powermate 4x 2" (exclusive to this Powermate). The adapter threads directly onto the chrome barrel in place of the eyepiece holder. The adapter allows a T-ring (sold separately) to be attached so you can connect your 35mm camera directly to the Powermate.
Tele Vue Optics
Tele Vue Canon 2.4" Wide T-Adapter (CWT-2070) $78.00
Canon EOS cameras are popular with astro-imaging enthusiasts. But, the typical T-ring/telescope setup does not take advantage of the wide aperture of the Canon bayonet mount: significant vignetting is caused by the constriction of the T-ring opening. Canon Wide T Adapter with Bayonet for 2.4" connects to your EOS in place of the T-ring and provides 25% greater aperture to minimize vignetting.
Tele Vue Optics
Tele Vue Nikon 2.4" Wide T-Adapter (NWT-2073) $78.00
Nikon cameras are popular with astro-imaging enthusiasts. But, the typical T-ring/telescope setup does not take advantage of the wide aperture of the bayonet mount: significant vignetting is caused by the constriction of the T-ring opening. Nikon F Wide T Adapter with Bayonet for 2.4" connects to your Nikon F-mount camera in place of the T-ring and provides 13% greater aperture to minimize vignetting. Can be used with Nikon Z-series mirrorless cameras using an F-to-Z adapter (FTZ) available at camera stores.
Celestron
Celestron Nikon Camera Adapter M48 (S20301) $39.95
Designed for attaching a Nikon DSLR camera to any of the Sky-Watcher 0.85x Focal Reducer/Correctors. Description M48 rings are used for larger format imaging. These are different than the standard T-Thread and are not suitable for use on our Collapsible Dobsonian line. M48 rings are to be used on the Esprit and ProED series when using the dedicated field correctors. Also for use with the Celestron T-Adapter Edge HD 9.25, 11, 14 48mm and other applications requiring a 48mm t-ring.
Celestron
Celestron T-Adapter For NexStar 4SE, C90/C... $45.95
This sturdy aluminum T-Adapter is the accessory of choice if you’d like to attach an SLR or DSLR camera to the smaller rear cell threads of a Celestron NexStar 4SE telescope or C90 spotting scope for prime focus photography. Description To get started, you’ll need the appropriate T-Ring for your camera body (#93402 for Nikon & #93419 for Canon EOS). Remove the lens from your camera and attach the T-ring in its place. Since the T-ring is camera-brand specific, it will snap right on just like a lens. Next, remove any accessories from the rear cell of your telescope. Screw...
Sky Instruments
Antares M42 Variable Camera Adapter (TEXT-42) $43.95
Astrophotography using intermediary lenses such as focal reducers, field flatteners, barlows etc. often require precision spacing to the image plane. TEXT-42 has M/F spacing for M42x0.75mm threads varying from 31-49mm and accepts 2" filters. It can be Hybridized with TEXT-48 to change either the input or output threads. Description Astrophotography using intermediary lens systems can require a precision back-focus to the image plane so as to not compromise color and field curvature. With this M/F M42 adapter you can have a separation range of 31-49mm. Comes with locking ring and accepts 2" filters.
Sky Instruments
Antares T2 Adapter for Series4 14mm and Se... $29.95
SW14S4 camera adapter to M42x0.75mm threads. Allows the use of the Speers-Waler Series 4, 6mm and Speers-Waler Series 4, 9.1mm for eyepiece projection. Requires t-ring specific to DSLR camera.
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Baader Planetarium
Baader Planetarium T-Ring Nikon to T-2 (24... $39.95
Baader T-Ring to connect Nikon DSLR cameras on the Astro T-2 system. Represents the standard exact distance of 55.0mm from the front support surface of the T-ring to the image plane of the camera body forth On the camera side: Nikon bayonet Telescope side: T-2 internal thread with 0.75mm pitch Specifications MANUFACTURER Baader Planetarium SKU (#) 2408300 EAN CODE 4047825012609 NET WEIGHT (KG) 0.02 OPTICAL LENGTH (MM) 8 USAGE to connect (D)SLR cameras to the Astro T-2 thread system CAMERA ADAPTABLE Nikon INNER DIAMETER / CLEAR APERTURE (MM) 40 OUTER DIAMETER 55 INNER CONNECTION (LENS SIDED) Thread, T-2 (M42 x...
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Celestron
Celestron T-Adapter EdgeHD 9.25, 11, 14 (9... $98.95
T-Adapter for 9.25, 11 & 14” EdgeHD optical tubes. It threads onto the rear cell. This T-Adapter allows you to attach your 35 mm DSLR camera to the prime focus of your EdgeHD telescope. This arrangement is used for terrestrial photography and short exposure lunar and planetary photography. It can also be used for long exposure deep-sky photography when using a separate guidescope. Both a T-Adapter and T-Ring are required to mount a 35 mm SLR camera to your instrument.
Orion Telescopes USD
Orion 2" Zero Profile Photo Adapter (05308) $39.95
The Orion Zero Profile Camera adapter fits 2" telescope focusers on refractor and reflector telescopes. This extremely versatile astrophotography accessory will help you capture images with telescopes equipped with 2" focusers. Description Many prime focus camera dapters for use with astrophotography telescopes have housings which can add distance between your imaging camera and the focal plane. This can make it difficult to achieve focus with certain astrohphotography camera and telescope combinations. Not so with the Orion 2" Zero-Profile Prime Focus Camera Adapter, which couples your camera to a telescope for prime-focus astrophotography. The zero-profile design provides the closest possible in-travel...
Sky Instruments
Antares T-Adapter For Schmidt-Cassegrains ... $41.00
TAL threads directly onto the back of your Schmidt-Cassegrain and outputs M42 T-thread with a 55mm extension. Description This sturdy metal T-Adapter is the accessory of choice if you’d like to attach an SLR or DSLR camera to the rear cell threads of a Schmidt-Cassegrain telescope for prime focus photography. T-Threads accept camera brand specific T-Ring (sold separately) Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument.    
Sky Instruments
Antares 2" Photo Adapter (DP2S) $39.95
The Antares 2" Photo Adapter works perfectly with 2" focusers for prime focus photography. Attach a T-ring for your SLR or DSLR and connect your camera. You are ready then to attach your camera to a 2" focuser or to a 2" diagonal. Or split the Photo Adapter and insert the 6.3 Focal Reducer/Corrector, add a t-ring and use the 6.3 focal reducer/corrector in a refractor with 2" focuser (see last photo) See additional photos for camera and telescope set-up. See our astrophotography videos for more information.  
Sky Instruments
Antares M48 Variable Camera Adapter (TEXT-48) $43.95
Astrophotography using intermediary lens systems such as, focal reducers, field flatteners, barlows etc.can require a precision back-focus to the image plane so as to not compromise colour and field curvature.  With this M/F M48 adapter you have a separation range of 31-49mm.  Comes with locking ring and accepts 2" filters. M/F spacing for M48x0.75 threads varying from 31-49mm. It can be hybridized with TEXT-42 to change either the input or output threads.

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