Why is the body open?

Started Feb 9, 2013 | Questions thread
Leonard Migliore
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Not an adhesive
In reply to MaxTux, Feb 11, 2013

MaxTux wrote:

Old Tessar lens design was an early example: it was better than any similar 4-element lens mostly because the two rear elements were glued together (at that time, using something called "Canadian Balsam". Today they use Canadian Club).

MaxTux

Canadian Club is a lubricant, not an adhesive.

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Leonard Migliore

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