R8 buffer freezes after taking one photo

[Gravity]

When I take a single photo with my R8 camera using the Cannon EF mount adapter and my Rokinon14mm F2.8 Full Frame Ultra Wide Angle (w/ built in chip), My R8 will freeze up on me. The screen goes black, the shutter fires like it is taking a picture, the red buffer light turns on, and it gets stuck like this indefinitely. Not only do I have to turn off the camera, I need to remove the battery.

The 14mm Rokinon lens works with my EOS Rebel T7.My Cannon EF to RF adaptor works with my Sigma 70/200mm lens. I turned on "Release shutter without lens." I have not seen any more suggestions on any forums. 

[kvbarkley]

Note: this is the firmware for the *lens*, not the *camera*.

[lmmeredith]

Hi Marc,

Thanks for the firmware update tip. I was unable to perform the update myself, so sent the lens to Tampon for update. I received the lens back this morning with the  firmware updated. Very happy to report that the lens now operates without failure - even out to 300mm with AF and AS turned on!

Thanks again and to others who responded to my post.

-- Lynn

[March411]

Lynn, always glad to hear when a favorite piece of equipment can remain in a persons collection. Glad it worked out, kind of like an early Christmas present.

[Nixmix]

I have same problem with same lens and camera lol. I'll need to try that update, because I bought this lens as not working, but works perfect on 70d, but not on R8...i need to take battery out...now I have hope that an update will fix it... fingers 🤞