EOS R6 Mark II won't take photo with EF lens and adapter

[melblanks42]

Hi there, 

I have a Canon EF 70-300mm f4-5.6 and have just purchased a Canon R6 mark ii with an adapter. The lens fits onto the adapter but I’m unable to take a photo. Just wondering if this has happened to anyone else? 
Thanks, Mel 

[deebatman316]

I would recommend starting your own forum so we can better assist you.

[deebatman316]

The oldest lens I tested adapted on an EOS R6 Mark II was the old EF 70-210mm F/4 Arc Form Drive lens from 1987. Everything with the lens did work but the camera functioned in a degraded manner. Most features of the camera were unavailable. The 4 fps limit was even still in place that all Arc Form Drive lenses have.