K&F Concept Lens Mount Adapter with Tripod for Canon FD Lens to Pentax Q-S1 Q10 Q7 Q DSLR Camera Camera Body Premium-grade K&F Concept adapter,high precision,good quality. Smooth surface for effortless mount,Infinity focus allowed,anodized aluminum construction. Compatible with:Pentax Q-S1 Q10 Q7 Q Please note: It is not same between Canon FD mount and EF mount, this adapter ring is only for Canon FD mount lens, please contact us if you want to purchase for Canon EF mount lens. Please note: Infinity focus positionthe position of the infinity mark of the telephoto lens or super telephoto lens is shifted slightly to the positive side to enable focus adjustment even when focus shift is caused due to temperature changes.The shift range is denoted by an L-shaped line, Be sure to check the focus through the viewfinder even when you shoot at infinity.