have an EOS 350D available on which I want to test the use of my Nikkor AI lenses. I received the adapter ring today and tried it out right away. The processing of the adapter ring is very good, the connection to the camera works perfectly. Since there is no description, you first have to think about the correct attachment to the lens (description below). When this is done, the ring can be put on and fastened (relatively stiff). Detaching the ring from the lens is also relatively difficult, not at all for me at first until I found the right procedure and "practiced". A point is deducted for the missing description. All in all, a recommendable adapter. It remains to be seen whether the problems identified so far with the EOS can be solved with connected AI lenses. Description of connection/dismantling of the adapter lens: Set the maximum f-number on the lens. Position the adapter with its red dot opposite the black dot on the lens. Fasten anti-clockwise (movable pin of the adapter goes into the U-groove of the bayonet ring). This also ensures that the lens is correctly aligned when the adapter is connected to the camera (aperture and distance settings visible from above). To disassemble the adapter, hold the aperture ring with one hand and use the index finger of the other hand to press down on the small release lever while turning the other fingers clockwise to release the adapter from the lens.