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Taking apart a Meteor 17-69mm Zoom Lens


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#1 Peter Gilabert

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Posted 01 March 2017 - 11:50 AM

I had some pretty bad fungus on this bayonet lens so I figured I didn't have much to lose by disassembling it.
To my surprise I got it open and cleaned the fungus right off.
4 little rear elements popped out too and I think I put them back in the right order but the focusing isn't sharp at all.
I think this things been dropped at some point as I see evidence, also I hear a slight movement click if it's set anywhere but at 17mm tight.
The 4 small lenses have the inscriptions k,k, backwards N I think and what looks an I and L.
I think I've tried all permutations but maybe there's something deeper that's loose.
Any suggestions welcome.
(besides getting another lens, have that covered :) )
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#2 Dom Jaeger

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Posted 01 March 2017 - 06:06 PM

Oops! Yes nothing worse than elements falling out so you don't know which way they go back. It's very tricky getting them back without dust and fingerprints all over them too. A small suction cup can help.

There are a lot of combinations of 4 elements if you also don't know which surface faces forward. Were there also spacers between some elements?

You might find a diagram somewhere - maybe someone like Olex Kolynychenko, who sometimes posts here, would have one if you PMed him.

The click in the zoom is probably play in a cam track, shouldn't cause a total loss of sharpness. Most likely you just have the rear elements out of order or backwards or not properly spaced. Welcome to the world of lens repair!
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#3 Peter Gilabert

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Posted 02 March 2017 - 07:33 AM

Dom,
Thanks for the ideas. I'll try Olex. 24 different orders plus which way they face is a lot of combinations, although some don't fit behind others (no spacers)
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#4 Dom Jaeger

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Posted 02 March 2017 - 05:25 PM

This site has a diagram of a Meteor 17-69, not sure if it's accurate though:
http://lens-club.ru/...1481.html</div>

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#5 Peter Gilabert

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Posted 02 March 2017 - 10:42 PM

Dom,
Olex sent me a scheme that's pretty accurate once I understood it. This one seems off but hey thanks anyway.
I actually finally put them in right so I'm good to go!
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