The Haida 77mm Magnetic Adapter Ring screws onto the filter thread of your compatible lens and lets you magnetically attach Haida Magnetic series filters to it. This magnetic ring enables you to quickly and easily swap magnetic filters.

Screws onto Filter Thread of Your Lens    Allows Quickly Mounting Magnetic Filters

Related Questions and Answers

Q: 1. Can I configure this control ring to change the aperture of an L lens?

A: Yes.

Q: 2. Does the control ring mount adapter come with dusk covers for the RF and EF sides? Or are they separately purchased?

A: Yes the adapter comes with the front and rear caps.

Q: 3. So if I use this adapter with the EF Len's, let's say 50mm 1.2, will I be able to set the ring like RF lens and use It?

A: Yes this adapter would allow to maintain full control of a Canon EF 50mm f/1.2L lens via the control ring.

Q: 4. Will this work on the RP

A: The Canon Control Ring Mount Adapter EF-EOS R, will work on the Canon RP camera.

Q: 5. I assume this will work with the R3 when it comes out. Is this correct?

A: The Canon Control Ring Mount Adapter EF-EOS R is compatible with the Canon EOS R3 camera.

Q: 6. Will this work with the Canon C70?

A: Yes, the Canon Control Ring Mount Adapter EF-EOS R is compatible for use with the Canon EOS C70 Cinema Camera.

Q: 7. When this adapter is used to control aperture, does the camera focus at the set aperture, or wide open?

A: the camera focuses at wide open aperture

Q: 8. Will this adapter work in Video mode or just Photo mode?

A: This adapter works in both Photo and Video mode.

Q: 9. Do you have to assign a function to the control ring, or can you literally ignore the control ring?

A: You do not have to utilize the control ring on the Canon Control Ring Mount Adapter EF-EOS R. You can also get the version of the adapter that comes without a control ring: https://www.bhphotovideo.com/c/product/1433717-REG/canon_mount_adapter_ef_rf.html

Q: 10. When using this adapter with an ef-s lens, will there still be a 1.6 crop factor on the EOS R?

A: the crop factor is due to the sensor size is smaller than a typical full frame 35mm film size. when a lens is mounted on EOS R, which is a full frame camera, the crop factor is 1. i.e., a 50mm EF-S lens just have same image size as 50mm EF lens. however, since EF-S lenses are designed for smaller sensor, when mounted on full frame body the corners likely would have significant vignetting.