Web Analytics RiceHigh's Pentax Blog: Disassemble (and Repair) the FA 80-320 Zoom Lens

Friday, October 26, 2012

Disassemble (and Repair) the FA 80-320 Zoom Lens






Thanks to Blog reader MattMatic for his alert, here is the series of lens disassembling photos of his:-

http://www.photon.me.uk/pu/pentax_fa80_320/index.html

Full shared story here: http://www.pentaxuser.co.uk/forum/topic/fa80-320-37602

Btw, the MIJ label reminds me of those high quality days of those Pentax products, even a consumer zoom like this was made in Japan, where and when the QC is far better! And, the lenses are much cleaner inside out of the factory, too!


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Comments (5)

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The same lens (and similar story with high quality photos) can be found here:
http://www.pentaxian.nl/index.php?topic=24882.0 (in Dutch).
1 reply · active 645 weeks ago
Interesting, thanks.
Hello Rice,
I'm a novel photo entusiast, I have a Canon Rebel T3 (Ok, not a Pentax... ) with an old Soligor zoom+macro 28-200 mm adapted to the main body with a ring. Yesterday I was testing for the first time the assembling, and from shot to shot, gradually, the focus movement was getting harder and harder. At last, the focus tube was completely stuck. It seems as if it were something in the inner stopping the piece. I decided to disassemble, but I can't find how to put apart the focus tube. Do you know where can I find some information about that? I want to solve the problem but without destroy the whole thing.
Thanks in advance,
Santiago
forget it George
Mango Biche's avatar

Mango Biche · 387 weeks ago

Tropical Greetings,

Although I did follow the links to the 'lens disassembly' blog, they were unfortunately nothing but a blind alley!

I know how to disassemble the lens, which is a Pentax F Zoom 28-80 f/3.5 with macro, my problem is with how to separate the first group of lenses which are mounted in sealed (not hermetically, because there's fungus in there!) assembly and I can't see how to extract the lens elements for cleaning! I have a proper lens spanner but for the life of me I can't figure out how Pentax have mounted the elements into the group!

Does anyone have experience with this series of lenses that can 'guide' me about where to look!

Many thanks.

Mango Biche

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