Infinity lock Industar 22
Old 12-05-2013   #1
Snowbuzz
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Infinity lock Industar 22

Hi, a little help please:-

I just mounted an Industar-22 50mm lens to a Voigtlander LTM adapter. Unfortunately, when I press the locking tab to move the lens out of infinity or vice-versa the bottom of the tab abuts the adapter making unlocking impossible (unless I dismount the lens). Ahem, should I saw off the bottom of the locking tab? Any other solutions? Thanks so very much for the help.

- Rory
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Old 12-05-2013   #2
AndersG
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If you mount it while not locked to infinity you can probably focus out to about 20-25 meters. Depending on your needs that might be enough..
The depth of field scale on my FED lens suggests that infinity should be "acceptably" sharp from f/4 when focused on 20 meters.

/Anders
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Old 12-06-2013   #3
Dralowid
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The Voigtlander adaptor has a cut away section to allow the infinity lock to be depressed. This is positioned to work for lenses where the infinity lock ends up around 7 o'clock.

It sounds like your FSU lens is not matching up with this when screwed home which is an old problem. They sometimes end up nearer 9-10 o'clock

Have a look, I suppose you could file some metal away if needed.
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Old 12-06-2013   #4
Snowbuzz
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Ah, thanks Anders: I'll try that!

Hi Micheal, thanks, it's as exactly as you describe: the tab isn't lining up with the cut away section.
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Old 12-06-2013   #5
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Had this problem on my FED 50 collapsible, but the offset to the cut away section of the adapter was quite small (about 3-4mm).

I carefully filed the cut away a bit larger. Worked fine
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Old 12-06-2013   #6
ruby.monkey
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Do you need the infinity lock? If not, you should be able to remove it without damaging the lens.
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Old 12-06-2013   #7
Snowbuzz
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Hi Ruby, I do see a knurled portion that I'll probably go at with a pliers, thanks!
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Old 12-06-2013   #8
Snowbuzz
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Hey guys, thanks for the help: I sawed it off.
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Old 12-06-2013   #9
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Quote:
Originally Posted by Snowbuzz View Post
Hey guys, thanks for the help: I sawed it off.
Attaboy! When it don't work right, mod it!
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