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01-16-2012, 01:39 PM   #1
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Disassembly of M zoom

I bought an M40-80 zoom that was infected with fungus. I bought this for a "project", it was cheap and I've wanted to take a lens apart. I've removed the first two elements and the rear and next two from the rear.. There was fungus on the first two, the and the rear. The two remaining elements have fungus between them, but none on the back of element four which is now exposed from the back. The aperture blades are behind element four and are very clean and snappy. Element three appears to possibly be threaded, nothing holding it in from the front. It may even be glued? I don't know how to get it out. I would prefer not to disassemble the other internal parts of the lens. Once three is out I can complete the cleaning and put the lens back together. Possibly these were assembled from the rear of the front barrel, but I haven't figured out how to remove that, it is probably fastened internally since there are no external scrws on it.

Anybody have any insight on this?

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01-18-2012, 05:55 AM   #2
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Haven't got any advice but I'm curious to see how this turns out. I never had a need to take any of my lenses apart, probably a good thing for the lens, but I've been tempted just to see how they are put together. Good luck with this project Tom.

Tom G
01-18-2012, 04:46 PM   #3
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QuoteOriginally posted by 8540tomg Quote
Haven't got any advice but I'm curious to see how this turns out. I never had a need to take any of my lenses apart, probably a good thing for the lens, but I've been tempted just to see how they are put together. Good luck with this project Tom.

Tom G
Thanks for the moral support. Right now it's on hold, I haven't had time to jump in more. I'm afraid I've got to find somewhere else to set this out, my wife is wanting the counter back. I've got to get some JIS screwdrivers before I go further. I've got some small Phillips, but I won't use them unless the screw has little resistance, I just don't want to screw up the heads.

Any Know-how out there?
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