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Konica Hexanon 80-200 f3.5
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PostPosted: Sun May 11, 2014 8:09 am    Post subject: Konica Hexanon 80-200 f3.5 Reply with quote
I took some of my lenses out today including a new copy of the Hexanon 80-200 f3.5. Here are some reference shots. This lens is a very nice option in the 80-200 range. It's heavy and large and harder to nail focus than with some of my other lenses, but it is a high quality optic.













PostPosted: Thu May 18, 2017 5:20 am    Post subject: Reply with quote
Anyone knows how to disassemble this lens from the top? I need to clean first front elements inside and I cannot unscrew top of the lens, after removing blocking bolt.

Last edited by gud on Thu May 18, 2017 11:19 am; edited 1 time in total


PostPosted: Thu May 18, 2017 8:44 am    Post subject: Reply with quote
gud wrote:
Anyone knows how to disassemble this lens from the top? I need to clean first from elements inside and I cannot unscrew top of the lens, after removing blocking bolt.

If you are not experienced repairman i would advice against doing zoom service.


PostPosted: Thu May 18, 2017 11:23 am    Post subject: Reply with quote
Pancolart wrote:

If you are not experienced repairman i would advice against doing zoom service.

Well, there is no other way. Service will probably costs too much . I got this lens for 10 EUR from the pile of garbage on flea market, and considering internet opinions , i do not think it worth to invest more money into it. Will try to not forget to put the pictures here when i disassemble it.


PostPosted: Thu May 18, 2017 11:34 am    Post subject: Reply with quote
gud wrote:
Anyone knows how to disassemble this lens from the top? I need to clean first front elements inside and I cannot unscrew top of the lens, after removing blocking bolt.


Four group zooms (and the AR 3.5/80-200 is a four group zoom!) often have a front group (=focusing group) that can be dismantled quite easily. I will check it tomorrow and see if there's a simple way to dismantle & clean it!

Opening and cleaning the zoom mechanism is another thing - usually much more complicated, and not so easy to do.

Stephan


PostPosted: Fri May 19, 2017 2:37 pm    Post subject: Reply with quote
stevemark wrote:
I will check it tomorrow and see if there's a simple way to dismantle & clean it!

Stephan


Thank you! I will post pictures of problematic place.

Update:
I was able to disassemble the lens. I got confirmation of the theory that old Konica`s coated elements are prone to unrecoverable coating degradation.
One that looked as fungus , actually was coating degradation and became worth after tries to clean it up.
Will create separate thread in lens cleanup and repair forum.
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