The Fotodiox Pro TLT ROKR adapters allow for a 10mm shift left and right as well as the ability to tilt 10 degrees one way for perspective correction. The shift functionality of the TLT ROKR allows for distortion control and the ability to experiment with creative effects. As well as providing correction for Parallax issues, the tilt correction will allow for greater composition control By allowing the separation of objects within the same plane. This will help to highlight the key items in the composition without the need to rearrange or rethink your setup. Utilizing both tilt and shift provides new levels of technical control. ***This adapter will only allow Mamiya 645 manual focus lenses to be mounted. It is NOT compatible with Mamiya 645AF or PHASE ONE XF mount lenses. This adapter is compatible with Canon EOS RF-mount Mirrorless cameras such as the EOS R and EOS RP. Please Note: With enough shift movement on certain focal lengths, vignetting may occur. This is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc. ) will be disrupted. Set your camera to “Manual' or ‘Aperture Priority' for metering. If camera does not release be sure to enable ‘shoot without lens' in camera settings. We state “infinity focus allowed” because our adapters are designed to be universal which can prevent some lenses from focusing to infinity at the infinity mark.