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financephotog
Joined: 18 Feb 2021
Posts: 34
Location: Florida
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 Posted: Sat Apr 24, 2021 4:24 am Post subject: Internal cleaning of Optar Lens front element |
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I have some fogging in my 135mm Optar lens on my 4x5 Crown Graphic.
See picture:
https://flic.kr/p/2kUFDgT
The fogging seems to be in between the lens elements. Is there a way to disassemble the lens for cleaning (and then reassemble it)? |
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45PSS
Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.
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| Posted: Sat Apr 24, 2021 9:43 pm Post subject: |
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The Optar is a Tessar lens, air spaced elements in front and a cemented pair in the rear. Unscrew the trim ring on the front to remove the front element. The trim ring likely has a threadlocker on the threads that will dissolve with Acetone or acetone based nail polish remover.
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The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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financephotog
Joined: 18 Feb 2021
Posts: 34
Location: Florida
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| Posted: Sun Apr 25, 2021 1:44 am Post subject: |
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| Awesome, thank you. I will give that a try. |
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financephotog
Joined: 18 Feb 2021
Posts: 34
Location: Florida
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| Posted: Sun May 30, 2021 11:20 pm Post subject: |
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Got it apart!
Used acetone on the thread, then a tool constructed from the ring that screws the shutter assembly into the back of the lens board (which is the right diameter), plus two looped pieces of blue tape wrapped to have sticky sides in both directions.
https://flic.kr/p/2m2ErgV
When putting it back together, is it recommended to put a thread locker on there again? Something like Loctite blue? |
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45PSS
Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.
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| Posted: Sun May 30, 2021 11:45 pm Post subject: |
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Use clear nail polish sparingly at 1 or 2 points.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU. |
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xmishx
Joined: 23 Jan 2018
Posts: 7
Location: Portland, OR
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| Posted: Fri Nov 25, 2022 4:34 pm Post subject: |
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This has been the most helpful info I have found for this dilemma. I hope to have the same result.
Thank you. |
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gregr
Joined: 25 Mar 2023
Posts: 4
Location: Oregon
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| Posted: Tue Mar 28, 2023 7:43 pm Post subject: |
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| great work mat. where can I get one? |
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