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foursquare ![]() Optics GrassHopper ![]() Joined: November/09/2016 Status: Offline Points: 9 |
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What is this crystal formation in the lens? |
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foursquare ![]() Optics GrassHopper ![]() Joined: November/09/2016 Status: Offline Points: 9 |
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gunut ![]() Optics GrassHopper ![]() Joined: March/17/2016 Location: Wisconsin Status: Offline Points: 35 |
looks like a fungus to me....get it cleaned ....or it will etch the glass....
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gunut
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tahqua ![]() MODERATOR ![]() ![]() Have You Driven A Ford Lately? Joined: March/27/2006 Location: Michigan, USA Status: Offline Points: 8342 |
Yes, nice call and very interesting.
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Doug
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Peddler ![]() Optics God ![]() ![]() Joined: July/04/2012 Location: Oswego,NY Status: Offline Points: 10256 |
Nice to see you back Bill.
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When you are dead, you don't know you are dead.It is difficult only for others.
It is the same when you are stupid. |
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WJC ![]() Optics Apprentice ![]() ![]() Joined: May/28/2014 Location: Twin Falls, ID Status: Offline Points: 151 |
Hi, Skip:
'Never been gone. OT is one of the forums I keep open on my "Big Mac." Bill |
"What lies behind you and what lies before you are tiny matters compared to what lies within you."—Ralph Waldo Emerson
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sucker76 ![]() Optics Journeyman ![]() ![]() Joined: June/13/2013 Location: Texas Status: Offline Points: 307 |
No offense I'll offer anything if I think it helps. I'm a little south of Houston.
When you say elements separating are you talking about the lens coating or the actual glass lenses ungluing themselves from each other? I've never seen anything like it on an optic. |
Stamp collecting since 2015
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Sparky ![]() Optics Master Extraordinaire ![]() Joined: July/15/2007 Location: SD Status: Offline Points: 3680 |
If it is the elements of his objective beginning to separate. Wouldn't that possibly be covered by Zeiss's warranty? Or was the warranty different in the 80s?
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WJC ![]() Optics Apprentice ![]() ![]() Joined: May/28/2014 Location: Twin Falls, ID Status: Offline Points: 151 |
The objective of most binoculars consists of a crown and a
flint element—usually Bk7 and F2 or F4. They are cemented together with Canada
Balsam (not “Canadian” Balsam) or Norland 61 thermosetting adhesive. Some
people say that the elements set with Norland are difficult to get apart.
However, I find a 4-pound shop hammer on a concrete slab works wonders. The
lens can never be used again but the stress relief is great. As you might guess
working with Norland takes a great deal of patience.
There is a good chance that the reason you haven’t seen this before is that you haven’t worked with binos every day for decades. Cheers, Bill |
"What lies behind you and what lies before you are tiny matters compared to what lies within you."—Ralph Waldo Emerson
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WJC ![]() Optics Apprentice ![]() ![]() Joined: May/28/2014 Location: Twin Falls, ID Status: Offline Points: 151 |
They don't cover anything before WWII and may point out that the lens was subjected to direct sunlight. You'll have to call. Bill Edited by WJC - March/29/2018 at 16:44 |
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"What lies behind you and what lies before you are tiny matters compared to what lies within you."—Ralph Waldo Emerson
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