Canon Control Ring Mount Adapter EF-EOS R  type_Darkroom Accessories you’ll probably want to push

you’ll probably want to push it a stop or two

The flip-away lens cap holds well

and a Linhof groundglass back with fresnel

where it was known as the Blitz Box

This Galvin is in decent condition overall

Canon Control Ring Mount Adapter EF-EOS R &nbsptype_Darkroom Accessories you’ll probably want to pushThe Canon Control Ring Mount Adapter EF EOS R lets you mount Canon EF and EF S lenses to EOS R mount cameras but it also adds a programmable Control Ring, like you'd find on native EOS R lenses. You can set it to do almost anything: control aperture, adjust ISO, destroy objects with your mind no you can not. But it's in excellent condition, with only very minor cosmetic wear.