I've got a partially disassembled 85/1.8 preset Vivitar. T-mount, lots of aperture blades as usual for old preset stuff. I've seen 135/3.5s with similar cosmetics which might be internally similar.
Haven't been able to find how the mount end of the helical attaches to the mount itself. Seems like the mount is glued to the helical end, which doesn't really make sense. This lens is slightly cock-eyed at that glued joint, so it always focused off-center and I want to correct it to eventually test it and then slim down my 85mm choices.
Anyone taken one of these apart?