Leica Summar Aperture Ring Misaligned

Kumachrome

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Joined
Aug 19, 2017
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Hi there, bought a Leica Summar 50mm f2 with some haze. Cleaned most of the haze easily enough, but I've noticed that the aperture ring doesn't match the f stop numbers. For example, if I set the lens to f 12.5, the aperture blades will close down to 12.5, but the aperture ring itself is between 9 and 12.5. Or, setting the lens to the widest aperture requires the ring setting to go below f2. Is there a simple fix? Obviously, I don't want to just randomly start unscrewing things and then suddenly the aperture blades fall out.

On an unrelated note, is there a way to clean haze inside the front element? As in moisture inside the space between the two lenses that comprise the front lens element.

Thanks!
 
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