Dear Customer, so sorry to tell you that this adapter won't allow your nikon 1 s1 lenses to mount to my canon t2i. 

The adapter for a EOS body to a Canon FD manual is the adapter needed. The Canon AE1 uses the FD/FL lens mount. The one I purchased works without a hitch. Mine is a K&F Concept Pro lens mount for Canon FD, FL lenses. From a F1 to a 5D Mark 4 with no issue. 

This has no focusing capability. That said it will allow your lens to infinity focus the same way as it did on its original mount. It won’t change that. The only issue I can imagine is the quality control issue if any from adapter to adapter, manufacturer to manufacturer. Basically if your lens goes past infinity then it won’t change anything with it mounted on this adapter or any other 

FD-EOS fit for Canon FD mount lens and canon EF mount camera body. canon 60d is EF mount, so the adapter ring can work with your camera, but you need to check your lens mount. could you pls let us know your lens specific model? service(AT)kentfaith(DO NOT)com, 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. 

A RF lens like a Leica-M lens will NOT focus to infinity on a SLR body like the Nikon. The Leica lens will only focus to a few inches, like a macro lens.