Quote Originally Posted by st3ve View Post
Well, I guess I have two working camera kits now. The magnets (I found an AE-1 service manual) got a good wipedown with some alcohol, and it's like new........
The armature is the moving part and the (electro)magnet is the part in the center of the coil.

The older breechlock lenses didn't lock the collar in the open position when the were removed from the camera & they wouldn't mount properly because the pin on the back of the lens and the notch on the mount weren't aligned.
The newer BL lenses have a locking pin that keeps the ring in the proper position most of the time & the FD lenses are the most fool proof.