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aperture ring offset


zekai_h

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<p>Got a leica cl and a 40mm lens at $210, and you get what you paid. It turns out that the lens has some serious problem. Although the aperture works from 2 to 16, but the mark is offset by about 4 stops. So I wont be able to easily tell what's the current aperture, any suggestion?<br>

(I was crazy enough to try to disassemble the lens to adjust it, but some screws are too old to take off )<br>

Thanks in advance.</p>

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<p>Many aperture rings on lenses are zeroed on the mark and then held in place by 3 grub screws. If you can't find or identify these, or they are too difficult to slightly loosen, but the diaphragm works fine and the adjustment ring opens and closes the blades fine, the simple answer is to merely make a new mark with a "sharpie" pen, or cut a triangulated piece of black electrician's tape (if the body is chrome) or white tape (if the body is black) and affix it to the appropriate spot on the lens housing. Of course you can't tell the DOF this way, but you can certainly tell the F stop.</p>
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<p>Thanks Stephen. I did find those screw, but they are hard to loosen. <br>

The black tape is a great idea. I forgot that I have black tape (I used them to mask my other cameras' logos). I would use it and remark the apertures.<br>

I still can tell the DOF because only the aperture ring is wrong, the DOF and the focus marks are still correct. <br>

Thanks.</p>

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<p>Get a few little bottles of paint and put your own markings on it. For that sort of price, which is essentially a giveaway for that combo, some allowances are to be expected. What a steal, funny aperture markings or not. One of my favorite M bodies, and the lens is a killer.</p>
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<p>Thanks Steve. I like it's compact size, easily fit into my pocket. And as you said, the price is giveaway for the combo. I tested the lens on my m9 and works great. The light meter looks accurate(I compared it with what my m9 suggests well-expose.) I would finish this roll of film and develop to see whether there is any light leaking.</p>
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<p>The aperture markings are set by the very very small screw on the front ring of the lens. On my Summicron-C, it is between the serial number and the 'S' of Summicron. Take this out and you can rotate the dot, I beleive, or maybe it was the numbers that rotate?</p>

<p>My 40mm was off, but only by half a stop. Here's a link ot some discussion-<br>

http://www.rangefinderforum.com/forums/showthread.php?t=128987</p>

<p>And another person's info on the 40mm-<br>

http://jumboprawn.net/jesse/cams/gear-profiles/leica-summicron-40mm.html</p>

<p>Be careful about losing the front screw and the detent ball bearing. I work over a towel so things don't bounce away.</p>

<p> </p>

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