Quick Answer
For Canon shooters, choose the Opticron T Mount - Canon EOS if you use an EOS SLR, or the Canon FD version for manual focus FD bodies. Minolta and Pentax K users have dedicated Opticron T mounts that connect their cameras to any T2 threaded device.
T2 Thread Compatibility
All Opticron T mounts share the same T2 thread on the telescope side, so they work with Opticron Photoadapters or any other T2 threaded device. The difference is only in the camera-specific bayonet or mount that attaches to your camera body. This means you can swap between camera systems by changing just the T mount, not the entire adapter setup.
Manual Focus vs. EOS Bodies
The Canon FD and Minolta versions are designed for manual focus SLR bodies, which are typically older film cameras. The Canon EOS version is for the newer EOS SLR system, which includes both film and digital bodies. If you have a Canon FD lens system, the FD T mount is the correct match; if you have an EOS body, the EOS T mount is the one you need.
Trade-Offs at a Glance
- Canon FD vs. Canon EOS: The FD mount is only for manual focus FD bodies; the EOS mount is for the newer EOS system. You cannot use an FD T mount on an EOS body without an additional adapter, and vice versa. Match the T mount to your camera's specific mount type, not just the brand.
- Minolta and Pentax K: Both mounts are for manual focus SLR bodies. The Minolta version fits Minolta manual focus cameras, while the Pentax K bayonet fits Pentax K bayonet cameras. They are not interchangeable. Check your camera's mount type before ordering; these are not universal.
- T2 Thread Standard: All Opticron T mounts use the same T2 thread, so they work with any T2 threaded device, not just Opticron Photoadapters. This gives you flexibility if you switch telescopes or spotting scopes. If you already own a T2 threaded device, any of these T mounts will connect it to your camera.
Opticron T Mount Options
-
Opticron T Mount - Canon FD: Connects Opticron Photoadapters (or any other T2 threaded device) to Canon FD manual focus SLR camera bodies. This is the correct adapter if you use a classic Canon FD manual focus camera, such as the AE-1 or F-1.
Opticron T Mount - Canon FD
-
Opticron T Mount - Canon EOS: Connects Opticron Photoadapters (or any other T2 threaded device) to Canon EOS SLR camera bodies. This version is for modern Canon EOS SLR cameras, so you can attach a telescope or spotting scope to your current digital or film EOS body.
Opticron T Mount - Canon EOS
Which Opticron T Mount Fits You?
Best for
- Canon EOS SLR owners who want to attach a telescope or spotting scope to their modern camera body
- Photographers with classic Canon FD, Minolta, or Pentax K manual focus cameras who need a dedicated adapter
Not for
- Users with mirrorless cameras (these T mounts are designed for SLR bodies only)
- Anyone needing a universal adapter that fits multiple camera mounts without changing the T mount
