Adapting Olympus OM mount lenses.

Olympus OM mount lenses need to have the spring loaded aperture lever at lens mount fixed (jammed) at widest aperture for full aperture control.
   
Mounting
1. Align mounting mark on the OM lens with the lens release pin on mount ring. 
2. Turn the lens clockwise to mount. 

Dismounting
3. Turn the lens anti-clockwise to separate from camera.
Olympus1
Olympus Zuiko-S 50mm F/1.4 on Pentax K-r beside Olympus OM-1N with Zuiko Auto-MACRO 50mm F/3.5 with Varimagni Finder attached. (Click to view larger image)
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