Celestron 42mm T-Ring for Canon M-Mount

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- T-Ring attaches to M-mount Canon mirrorless camera bodies
- Works with Celestron T-Adapters and others with a standard M42x0.75 T/T2 thread
- 42mm female diameter thread
- Sturdy bayonet flange locks for a secure fit
This T-Ring fits EOS M-mount mirrorless cameras only. It will not work with other Canon camera bodies like the EOS RF-mount or EOS EF-mount model cameras without adding a Canon adapter to convert those cameras to M-mount.
A T-Ring is one of the first accessories you will need to take pictures through a telescope or spotting scope. If you have a Canon EOS mirrorless camera body, the Celestron EOS M-Mount T-Ring #93407 is the one for you.
How to Use
To use this T-Ring, place the M-Mount T-Ring on your Canon mirrorless camera. Just like changing a lens, line up the T-Ring to your camera’s lens mount. Push it in and turn until you hear a click. The T-Ring has a sturdy bayonet flange that locks for a secure fit. Once you attach the T-Ring to your camera, you’re ready to connect your telescope. The telescope side of the T-Ring has threads that accept a variety of camera adapters, including the Celestron T-Adapter. The adapter you choose depends on the type of photography you wish to do.
Body
The Canon M-Mount 42mm T-ring is machined aluminum black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The T-Ring has a ribbed surface for a secure grip while threading/unthreading. The Canon M-Mount 42mm T-Ring is compatible with M42 x 0.50 (T-Thread) camera adapters.
Terrestrial and Celestial Imaging
Pair your T-Ring with a Celestron T-Adapter to turn your telescope or spotting scope into a large telephoto lens. Depending on the optics you own, pair your M-Mount T-Ring with these adapters:
- Spotting Scope*: Universal T-Adapter - 1.25" # 93625
- Schmidt-Cassegrain telescope: T-Adapter for Schmidt-Cassegrain Telescopes # 93633-A
- Refractor telescope: Universal T-Adapter - 1.25" # 93625
- Newtonian Reflector telescope: Universal Barlow and T-Adapter - 1.25" # 93640
- NexStar 4SE: T-Adapter, NexStar 4SE # 93635-A
- EdgeHD (8”): T-Adapter, (EdgeHD 8) # 93644
- EdgeHD (9.25”, 11”, 14”): T-Adapter, (EdgeHD 925, 11 & 14) # 93646
* Please reference specific Celestron product pages for compatibility
Specifications:
- Thread: M42 x 0.75 (not 0.5 pitch as incorrectly listed on Celestron's site)
- Camera mount: Canon M-mount for mirrorless cameras
- Construction: Aluminum black anodized
- Outside Diameter: 65mm (2.56")
- Thickness from flange = optical length: 10mm (0.39")
- Weight: 1.76 oz (50 g)
Other Information
- Country of Manufacture: Taiwan
- Celestron Warranty: Two-year factory limited warranty (within US/Canada only).
A T-Ring is one of the first accessories you will need to take pictures through a telescope or spotting scope. If you have a Canon EOS mirrorless camera body, the Celestron EOS M-Mount T-Ring #93407 is the one for you.
How to Use
To use this T-Ring, place the M-Mount T-Ring on your Canon mirrorless camera. Just like changing a lens, line up the T-Ring to your camera’s lens mount. Push it in and turn until you hear a click. The T-Ring has a sturdy bayonet flange that locks for a secure fit. Once you attach the T-Ring to your camera, you’re ready to connect your telescope. The telescope side of the T-Ring has threads that accept a variety of camera adapters, including the Celestron T-Adapter. The adapter you choose depends on the type of photography you wish to do.
Body
The Canon M-Mount 42mm T-ring is machined aluminum black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The T-Ring has a ribbed surface for a secure grip while threading/unthreading. The Canon M-Mount 42mm T-Ring is compatible with M42 x 0.50 (T-Thread) camera adapters.
Terrestrial and Celestial Imaging
Pair your T-Ring with a Celestron T-Adapter to turn your telescope or spotting scope into a large telephoto lens. Depending on the optics you own, pair your M-Mount T-Ring with these adapters:
- Spotting Scope*: Universal T-Adapter - 1.25" # 93625
- Schmidt-Cassegrain telescope: T-Adapter for Schmidt-Cassegrain Telescopes # 93633-A
- Refractor telescope: Universal T-Adapter - 1.25" # 93625
- Newtonian Reflector telescope: Universal Barlow and T-Adapter - 1.25" # 93640
- NexStar 4SE: T-Adapter, NexStar 4SE # 93635-A
- EdgeHD (8”): T-Adapter, (EdgeHD 8) # 93644
- EdgeHD (9.25”, 11”, 14”): T-Adapter, (EdgeHD 925, 11 & 14) # 93646
* Please reference specific Celestron product pages for compatibility
Specifications:
- Thread: M42 x 0.75 (not 0.5 pitch as incorrectly listed on Celestron's site)
- Camera mount: Canon M-mount for mirrorless cameras
- Construction: Aluminum black anodized
- Outside Diameter: 65mm (2.56")
- Thickness from flange = optical length: 10mm (0.39")
- Weight: 1.76 oz (50 g)
- T-Ring attaches to M-mount Canon mirrorless camera bodies
- Works with Celestron T-Adapters and others with a standard M42x0.75 T/T2 thread
- 42mm female diameter thread
- Sturdy bayonet flange locks for a secure fit
This T-Ring fits EOS M-mount mirrorless cameras only. It will not work with other Canon camera bodies like the EOS RF-mount or EOS EF-mount model cameras without adding a Canon adapter to convert those cameras to M-mount.
A T-Ring is one of the first accessories you will need to take pictures through a telescope or spotting scope. If you have a Canon EOS mirrorless camera body, the Celestron EOS M-Mount T-Ring #93407 is the one for you.
How to Use
To use this T-Ring, place the M-Mount T-Ring on your Canon mirrorless camera. Just like changing a lens, line up the T-Ring to your camera’s lens mount. Push it in and turn until you hear a click. The T-Ring has a sturdy bayonet flange that locks for a secure fit. Once you attach the T-Ring to your camera, you’re ready to connect your telescope. The telescope side of the T-Ring has threads that accept a variety of camera adapters, including the Celestron T-Adapter. The adapter you choose depends on the type of photography you wish to do.
Body
The Canon M-Mount 42mm T-ring is machined aluminum black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The T-Ring has a ribbed surface for a secure grip while threading/unthreading. The Canon M-Mount 42mm T-Ring is compatible with M42 x 0.50 (T-Thread) camera adapters.
Terrestrial and Celestial Imaging
Pair your T-Ring with a Celestron T-Adapter to turn your telescope or spotting scope into a large telephoto lens. Depending on the optics you own, pair your M-Mount T-Ring with these adapters:
- Spotting Scope*: Universal T-Adapter - 1.25" # 93625
- Schmidt-Cassegrain telescope: T-Adapter for Schmidt-Cassegrain Telescopes # 93633-A
- Refractor telescope: Universal T-Adapter - 1.25" # 93625
- Newtonian Reflector telescope: Universal Barlow and T-Adapter - 1.25" # 93640
- NexStar 4SE: T-Adapter, NexStar 4SE # 93635-A
- EdgeHD (8”): T-Adapter, (EdgeHD 8) # 93644
- EdgeHD (9.25”, 11”, 14”): T-Adapter, (EdgeHD 925, 11 & 14) # 93646
* Please reference specific Celestron product pages for compatibility
Specifications:
- Thread: M42 x 0.75 (not 0.5 pitch as incorrectly listed on Celestron's site)
- Camera mount: Canon M-mount for mirrorless cameras
- Construction: Aluminum black anodized
- Outside Diameter: 65mm (2.56")
- Thickness from flange = optical length: 10mm (0.39")
- Weight: 1.76 oz (50 g)
Other Information
- Country of Manufacture: Taiwan
- Celestron Warranty: Two-year factory limited warranty (within US/Canada only).

Celestron 42mm T-Ring for Canon M-Mount
