RF W-Nikkor 3.5cm/2.5 misalignment disassembly/ calibration

kamshingk

kamshingk

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May 10, 2012
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Recently I acquire a nice wide angle lens with little sign of use, the W-Nikkor 3.5cm/2.5 deserves so much praise for its lightweight and compact built. but due to poor work from some low skilled repairman, the aperture may be shifted/ misaligned somehow (my assumption was proved as numerical designation markings were found in the inner barrel of lens, which is common stamp/ signature practice among non-official servicemans when you send a lens for CLA). Previously @underlord posted similar question in http://www.rangefinderforum.com/forums/showthread.php?t=143322 so i would like to share my experience to whom interested, especially Vigos.

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You can see the aperture does not line up when click stop at f/2.8

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So let's get start to disassemble the lens, unscrew the front lens using lens opener.

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Take up the distance ring by unscrewing 3 little winkles.

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Remove one little screw and loosen the retention ring anticlockwisely.

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Check the F/2.5 click stop is line up with the metal hook then tighten the retention ring at the bottom.

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Assemble everything back, now you see the aperture click stops align with the dot. Hurray!


P.S. thanks @goliathus for some help.
 
Perfect! And thanks a lot for the well documented repair. That should be very helpful.
 
I had one that had the same problem (after I had taken it apart and incorrectly reassembled it...) An easy thing to overlook. I'd guess this happens quite often when repairmen are unfamiliar with this design.
 
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