Sticky / Slow Aperture blades in K series

edom31 · 01-24-2020, 07:58 AM

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?

**pepperberry farm** · 01-24-2020, 08:07 AM - **1 Like**

Advance Camera handles all my repair work - super guys to work with....

Advance Camera Repair | Camera repair, sales + service in Portland, OR

**monochrome** · 01-24-2020, 09:17 AM - **2 Likes**

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.

**sergysergy** · 01-24-2020, 10:31 AM - **1 Like**

Yes, with cold weather it can happen. I experienced the same thing with a camera body. Apparently grease gets harder.

**Just1MoreDave** · 01-24-2020, 10:37 AM - **1 Like**

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.

edom31 · 01-24-2020, 11:06 AM - **1 Like**

Originally posted by pepperberry farm

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.

**pentaxus** · 01-24-2020, 11:56 AM - **1 Like**

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.

**aslyfox** · 01-24-2020, 02:38 PM - **2 Likes**

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

01-24-2020, 07:58 AM	#1
edom31 Pentaxian Join Date: Nov 2017 Location: Garden City, NY Photos: Gallery Posts: 6,349	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?

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01-24-2020, 08:07 AM - 1 Like	#2
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,781	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
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	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
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,176	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
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	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
edom31 Pentaxian Join Date: Nov 2017 Location: Garden City, NY Photos: Gallery Posts: 6,349 Original Poster	Originally posted by pepperberry farm 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
pentaxus Site Supporter Join Date: Jun 2010 Location: Central Coast, CA Posts: 1,320	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 - 2 Likes	#8
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583	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