https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449715#M108536 <P>I have a fairly new R5 and an old set of Rokinon primes, plus a brand new set of Zeiss compact primes. The R5 has an R5 to ef adapter. While the camera sees the lenses, the record button is locked. All other functions appear to be working. I have image in the EVF, I can change ISO, etc., but it will not roll. Am I a dummy?? Have I missed something obvious??</P> Thu, 07 Dec 2023 22:58:09 GMT tvrichard 2023-12-07T22:58:09Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449715#M108536 <P>I have a fairly new R5 and an old set of Rokinon primes, plus a brand new set of Zeiss compact primes. The R5 has an R5 to ef adapter. While the camera sees the lenses, the record button is locked. All other functions appear to be working. I have image in the EVF, I can change ISO, etc., but it will not roll. Am I a dummy?? Have I missed something obvious??</P> Thu, 07 Dec 2023 22:58:09 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449715#M108536 tvrichard 2023-12-07T22:58:09Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449718#M108538 <P>You might need Release Shutter without Lens in Custom function #4.</P> Thu, 07 Dec 2023 23:09:08 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449718#M108538 kvbarkley 2023-12-07T23:09:08Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449720#M108539 <P>thanks a lot. that is the solution.</P> Thu, 07 Dec 2023 23:23:43 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/eos-R5-and-Zeiss-CP-lenses/m-p/449720#M108539 tvrichard 2023-12-07T23:23:43Z