Hello, My wife bought a used AE-1 Program a couple of months ago, together with a Canon 50 mm f/1.8 lens. The camera and lens are in pristine condition, everything works perfectly, and she's very happy with it. And since she enjoys it so much, I thought I'd get her a wide angle lens to go with it. I found an FD-mount Hanimex 28 mm f/2.8 in perfect condition. But when we mounted it on the camera, surprise! It's completely out of focus! The viewfinder is just a massive blur, and turning the focusing ring doesn't help at all. At first I thought that the mount was wrong. Maybe it had been incorrectly labeled as an FD-mount. But it doesn't look like an R or FL. It does look like an FD. This is the 50 mm lens, which works fine: And this is the Hanimex, which doesn't: There is one difference in the way it mounts, though. To mount the Canon lens, I rotate the whole lens until it clicks in place, at which point a small button on its side raises a bit. This button will then be used to unlock the lens when I want to remove it from the body. The Hanimex must be put on the body, then held in place with one hand, while I rotate a locking ring with the other. It's clear to me that the lens isn't a good match for my camera, so I will definitely return it. I bought it from a reputable store with a good return policy. But I'd just like to understand what the problem is. It looks like an FD lens, it mounts on an FD camera, but its focus plane is nowhere near where it should be. If I move it a bit further away from the camera, it gets worse. So it looks like it should actually go deeper inside the camera to focus correctly. Thank you.