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01-24-2020, 07:58 AM   #1
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Sticky / Slow Aperture blades in K series

Hello,

My 100/4 Macro woke up today with sticky aperture blades... No visible oil (I have not opened the lens). Anyone xperience cold weather doing this? It is my only suspicion since a few months ago it was perfect...

Thanks for any info...

Ohh, does anyone know if Eirc still does CLAs? If not, anyone else recomended?

01-24-2020, 08:07 AM - 1 Like   #2
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Advance Camera handles all my repair work - super guys to work with....

Advance Camera Repair | Camera repair, sales + service in Portland, OR
01-24-2020, 09:17 AM - 2 Likes   #3
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Could be anything related to cold. Might even be a weak spring. Many K lenses have reached the age at which they need a CLA just to refresh the helicoid grease. Just have them all done one at a time.
01-24-2020, 10:31 AM - 1 Like   #4
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Yes, with cold weather it can happen. I experienced the same thing with a camera body. Apparently grease gets harder.

01-24-2020, 10:37 AM - 1 Like   #5
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It's more vulnerable to problems because it's a macro - the whole system has to cover a longer distance. It probably doesn't matter what the actual problem is, the fix is always going to be a CLA.
01-24-2020, 11:06 AM - 1 Like   #6
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QuoteOriginally posted by pepperberry farm Quote
Advance Camera handles all my repair work - super guys to work with....Advance Camera Repair | Camera repair, sales + service in Portland, OR
I asked for a quote here... Looking as well for a local spot in Westbury.
01-24-2020, 11:56 AM - 1 Like   #7
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In hot weather the focusing helix grease can evaporate and condense on the diaphragm blades in a film so thin as to be invisible. Cold weather lets you know it is there.
01-24-2020, 02:38 PM   #8
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you could give this craftsman a call, he is located in Topeka Kansas

https://phototronic.biz/

he did a great job for me when my D FA 150-450mm literally fell apart

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