Ring Canon Eos

Ring Canon Eos
What old media Pentax lens can be used in a Canon Eos body via an adapter, KA, M42, or the mounting screw?

Am looking to buy an old Pentax lens for my Rebel T1i principal because they are cheap (and apparently of good quality) and you can use the aperture ring to control opening during video recording, which otherwise fully automatic.

I do not think you can put in a mounting frame ak cos [lens trusts in me, I've searched everywhere for documentation, I have some goals in my film Pentax SLR] think it's because the distance from the sensor with the Pentax lens is shorter than the Canon lenses are designed for a lens adapter to push further than you need to bring the lens closer to the sensor [could some surgery on] but if the lens were able to get, or make an adapter, you lose the ability to focus at infinity, also would probably have to be manual focus and aperture, Nikon lenses will work with an adapter for Nikon lenses are further away than lenses Canon sensor so with the right adapter you can use Nikon lenses on a canon body, but not vice versa.

The Ring Jumper – Canon Eos 550D / Rebel T2i Short Movie

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