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09-10-2020, 05:16 AM   #1
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Takumar 85-210mm F4.5 diopter stuck in case

I just received a Takumar 85-210 M42 lens with case. It includes the diopter in its small compartment.
I can not get the diopter out. It may have been sitting in its slot for decades. There is a small finger depression to lift it out but it will not budge.
Any ideas how to get it out short of destroying the top of the case?
Thanks,
Don

09-10-2020, 07:31 AM   #2
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Pry it open with a knife er a screwdriver
09-10-2020, 07:48 AM   #3
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I think anything you try will cause some damage. Maybe a judicial application of a little steam or water might loosen it up.
09-10-2020, 10:52 AM   #4
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QuoteOriginally posted by dwalt Quote
I just received a Takumar 85-210 M42 lens with case. It includes the diopter in its small compartment.
I can not get the diopter out. It may have been sitting in its slot for decades. There is a small finger depression to lift it out but it will not budge.
Any ideas how to get it out short of destroying the top of the case?
Thanks,
Don
I have the K-Mount version of this lens. Just to verify that you are meaning the close-up attachment filter that is stored in the top of the hard lens case? Just try and squeeze the outside of the case and see if that loosens up the filter compartment.

Phil.

09-10-2020, 01:13 PM   #5
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Try a plastic pry tool used on phones and computers, unlikely to scratch the filter and as the filter is normally under a flap in the case any damage to the appearance of the case will not be too noticeable , good luck
or you could try to find a friend with long acrylic nails

Last edited by garywakeling; 09-10-2020 at 01:14 PM. Reason: nailed it
09-10-2020, 01:36 PM   #6
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Try a combo of first a "cold compress" and then a "hot one" around/on top of the compartment to try alternately shrink and then expand it so as to break the "stiction" between it and the dioptre attachment - well-known approach in the auto industry to shifting the "bond" between two metal surfaces (like rusted-in bolts and the threaded holes in which they were screwed a long time ago), but, of course, in those circumstances the treatments are "more extreme"!
09-11-2020, 05:22 AM - 1 Like   #7
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Original Poster
Thanks for the suggestions.
I managed to get it out using a thin exacto knife going around the outside breaking the
lens loose from the felt.
Looks like new so I suspect it sat there for a long time.

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