The LA-05 T Ring Adapter for Canon EOS EF-Mount Cameras from Neewer can mount select Canon cameras with to a telescope for dynamic astronomical photography. The threaded side of the T ring can connect to the included 1.25" telescope adapter that is compatible with most telescope eyepieces, providing a secure and stable connection to the telescope, enabling the capture of stunning astronomical images. Made of durable aluminum alloy, it has anodized matte black interiors to prevent reflections and lens flare for ideal images.

For Canon EOS EF-Mount Cameras    Standard M42 x 0.75" T2 Thread    Standard 1.25" Telescope Eyepiece Thread    Aluminum Construction    Protective Black Anodized Finish

• Compatible with EOS EF-Mount camera bodies
• M42 x 0.75" (T2) to 1.25" telescope adapter fits most telescope eyepieces
• Straight grooves make it easy to screw and unscrew the T ring
• Manual focus and aperture adjustment only
• Included Allen wrench provides easy angle adjustment
• No electronic communication

Related Questions and Answers

Q: 1. Can you tell me if the Extender EF-2x-iii is compatible with this adapter?

A: The Canon Extender EF 2X III along with a compatible Canon EF lens will work with the Canon Control Ring Mount Adapter EF-EOS R.

Q: 2. Does this adapter have any sort of interface port build in to it, for example a micro-USB port, so that the ring's firmware can be upgraded if necessary?

A: No, the following unit does not offer any usb ports in order to provide updates.

Q: 3. Can I use this on a Canon 6D for lenses from a T5?

A: Nope. This is to adapt SLR lenses from Canon (EF-mount) to the RF camera system (EOS RP, R, R6, R5).

Q: 4. Will this adapter work to mount my canon EFS 55-250 lens to my canon EOS 5dsr ? I don't see it in the compatibility list

A: This adapter is only for use with Canon EF-S and EF DSLR lenses being attached to Canon's EOS R mirrorless camera mount. There isn't a way to attach an EF-S lens to an EF mount.

Q: 5. Can I configure this control ring to change the aperture of an L lens?

A: Yes.

Q: 6. How well does video autofocus work when using this adapter?

A: Autofocus is very good when using this adapter.

Q: 7. Why are you copying Fotodiox?

A: In reality, Fotodiox (a good company I do like, and I do use many of their products) is actually copying Canon. Canon makes the cameras with RF mounts and dictates the correct mechanical and electronic standards for them. Canon makes the RF lenses, EF lenses and EF-S lenses and dictates the correct mechanical, optical and electronic specifications for them. Fotodiox is riding on Canon's coat tails, and is only able to manufacture adapters thate are possibly "Canon comatible" because Canon allows it.

Q: 8. Does it works with the EF-S Sigma 8-16?

A: According to Sigma, the Canon Control Ring Mount Adapter EF-EOS R will work with the Sigma 8-16mm lens but the camera’s “Scene Intelligent Auto mode” cannot be used. Also the 8-16mm is a crop sensor lens so the camera would need to be a crop sensor model such as the R10,m R50, R7, or if you are using a full frame, the camera would need to be set to crop mode.

Q: 9. Will the adapter work with an EF L lens and teleconverter?

A: Yes, you would be able to use a Canon EF-mount lens and a teleconverter on the Canon Control Ring Mount Adapter EF-EOS R.

Q: 10. The instructions say to mount the lens first to the adapter then the adapter to the camera and when removing, first detach the adapter from the camera. Is there a problem leaving the adapter on the camera when changing EF lenses?

A: Thee could be. Please follow the mounting and dismounting procedure outlined by the manufacturer to avoid any damage.