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Archive 2012 · oil on aperture/Nikon 50mm 1.4lens
  
 
DesertDiesel
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p.1 #1 · oil on aperture/Nikon 50mm 1.4lens


Aperture sticks wide open and pics at f16 overexposed.

I took the lens apart and worked the 20yr old mechanism, but still sticks



Any suggestions for resolution?

TIA



Aug 24, 2012 at 11:46 PM
DesertDiesel
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p.1 #2 · oil on aperture/Nikon 50mm 1.4lens


Any one fix a sticking shutter?


Aug 26, 2012 at 12:20 AM
dcains
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p.1 #3 · oil on aperture/Nikon 50mm 1.4lens


Check the alt gear forum, and you'll almost certainly find the info you're looking for.


Aug 26, 2012 at 02:15 AM
 

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Smiert Spionam
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p.1 #4 · oil on aperture/Nikon 50mm 1.4lens


It's usually due to oil on the aperture blades, which are designed to work completely dry. If you've got it open enough to reach the blades, you can often clean them with just cotton swabs and lighter fluid (Ronsonol). Use it sparingly. The fluid is very thin and wicks, so if you're not careful, you can help it transmit the oily residue deeper into the mechanism, rather than remove it. It's easier if you have the lens sufficiently disassembled to reach the blades from both sides, but if you can only get at them from one side, it's usually still enough. In that case, it can be helpful to hold the lens so that you're introducing the swab from below, to help avoid muck dripping deeper into the lens or onto the glass elements. It's also helpful to twist the ends of the swabs so they're very tight, and not too linty. It sucks to reassemble a lens with a hunk of lint inside.

;- )

Go slow, change to a fresh swab often, and you should be ok.



Aug 26, 2012 at 03:26 AM
DesertDiesel
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p.1 #5 · oil on aperture/Nikon 50mm 1.4lens


Smiert, thanks so much for your input. I just needed the idea of what fluid to use for cleaning.

I will try it this week and advise. Good Day.



Aug 26, 2012 at 10:45 PM
runamuck
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p.1 #6 · oil on aperture/Nikon 50mm 1.4lens


Be careful. Ronsonol is EXTREMELY FLAMMABLE.


Aug 27, 2012 at 07:27 PM





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