When I focus on an object at infinity with a 50mm lens and use the A1's focusing screen, the distance scale on the lens falls at 25 feet. With a 24mm lens, again looking through the viewfinder and focusing at infinity, the lens scale says 5 feet. Conversely, setting the lens to infinity results in a blurry image in the viewfinder. When I use the same lenses on my AE-1 there is no problem - when an object at infinity is sharp in the viewfinder, the lens is at infinity - so I'm convinced the lenses are not the problem. Inside the A1, everything looks kosher. The mirror and the focusing screen appear to be in the correct location and are not loose. There has been no disassembly or repair of the body, and no damage that I know of. I haven't tested yet to see at what point images are sharp at the film plane, but given that the lenses appear to be good and there is no damage to the mount on the camera, I would be inclined to trust the distance scale on the lenses rather than what I'm seeing in the viewfinder. Has anyone had this problem? Any guesses as to what is wrong? Many thanks.