09-13-2020 08:09 AM
Sounds like a loose screw head, or some other object is blocking the rotation. However, the lens does not make a full rotation. Only make 1/3 of a turn almost sounds normal. Or, do you mean it does not fully turn far enough to be unseated?
09-13-2020 12:24 PM
Only turns 1/3 of the necessary rotation to remove
Sounds as though it probably needs repair. Forcing it could damage both the lens and the camera body. If you end up having to sacrifice one to save the other, I'd think the lens would be the more expendable.