So i have decided to purchase some more legacy lenses to play with. I bought a Super Takumar and a Jupiter 8 lens and purchased the necessary adapters to use them on my cameras, however neither the M42 Super Takumar or the M39 Jupiter 8 line up with the top of the camera when screwed into the adapter. I understand that for m42 lenses this was a common occurrence on film SLR's with the M42 mount. I noticed my adapter has 2 small holes opposite to each other on the outside ring. I am assuming you can use these to adjust the part of the adapter where the lens attaches, but i am not sure if this would be the fix to this issue. Does anyone know if there is a way to get the lenses to line up properly when used with an adapter? Does it matter where you start screwing it in?