I've purchased two lenses yesterday at a flea-market. Being both bayonette connection, just like on my Revueflex AC2, I thought they should fit. Back home I found out they don't. I haven't had the time to take pictures of the connections, going to do that later today. If it doesn't fit, can I make them fit in any way or did I buy something useless? #Edited# Both lenses have the DOF-button (button that shows you what apeture it's using) on the lens. The original lens has that button on the camera. If I could make the connection work, the camera wouldn't operate the apeture. When taking a picture, I would have to keep pressing (or find a way to lock this) the DOF-button until the shutter is released.