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08-19-2010, 05:48 PM   #1
Pentaxian
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Tokina 70-210mm repair assistance

I've done quite a bit of searching, and can't find any info on disassembling a Tokina 70-210 I got for my 35mm Pentax around 20 years ago. I found a tiny set screw, it refused to budge so I carefully drilled it out, still can't get the objective lens ring to budge. Does anyone happen to have a link on disassembling this lens? I'd like to get it working again, it looks like probably fungus inside, and if I trash it, oh well, but I do have optical repair training (binoculars and telescopes for the military) so I know what I'm doing once I get it open, but getting it open...

The objsctive lens ring has no slots, so a spanner wouldn't help, and it looks like brute force is doing nothing, I'm stumped. I've taken the mount off 2 or 3 times, no problem there but it won't get me into the front...at least it doesn't look like it will...

Any good advice or links will be appreciated.

10-21-2010, 05:51 PM   #2
Pentaxian




Join Date: Mar 2010
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Sorry, I can't help.

But, if you find a solution (and this thread still exists), could you please explain it?
I own the same lens; it is ok until now, but you never know...
10-22-2010, 04:27 PM   #3
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Original Poster
Nope, I haven't found a thing. I've scoured the net for 2 hours at a time a dozen times, can't find a thing on disassembly of this lens. Can't even find much on general lens repair...
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