I was lucky to pick up a good example of a canon FD 200mm F4 macro lens. Its a monster and so far its impressed me( I'm using an A7r). I purchased a novoflex adapter. Many of you already know( I didn't) FD lenses have an auto-aperture setting and to be used manually you may have to do some minor ( non-destructive) fiddling with the mount. When the adapter arrived I was really keen to take some photos I didn't read the instructions(my bad) but with beginners luck I actually fitted the adapter the correct way and the manual aperture ring worked as I expected. Of course a day or so later I swapped lenses so I took the adapter of the lens and then when I put it back on( now I know: incorrectly) the aperture appeared to be stuck at F4. There was a bit of a panic for a while and then I decided to read the instructions that came with the adapter With relief I discovered why there was a white dot and a red dot on the adapter for fitting the adapter to the FD lens. This led me to take more note of the adapter connection. The adapter I have locks into the camera and the lens but allows a small amount of twisting( less than 2 degrees) of the lens. Its not effecting pictures but given the cost of novoflex adapter is it an issue? I half suspect it relates to the vagaries of the auto/manual aperture FD mount. Has any one had a similar experience. Should I be asking for a replacement adapter?