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Posted by Doug Clifford on February 23, 2000 at 11:28:07:
In Reply to: How to fix a sticky aperture? posted by Scott on February 21, 2000 at 12:29:34:
: I have a 28mm Pentax lens with a problem. The iris seems to be 'sticky'... when you stop down the aperture ring the actual iris itself (the blades) closes down VERY slowly - as if there was oil on the blades making them stick. In other words, if I have the lens at f2.8 and then quickly close it down to f22 it takes about one and a half seconds for the iris to actually stop down.
The minute amount of oil lubricating the aperture leaves has become gummy; the shutter leaves need to be cleaned in solvent and relubricated. Unless you have the tools and the know-how, I'd recommend you leave lens repair up to a qualified camera tech. Yes, it will be expensive.
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