View Full Version : Is this separation?
Brian Ellis
9-Jan-2011, 22:03
Could someone tell me whether the white ring at which the red arrow is pointing is separation and if not, what it is if anything abnormal?
Is that a modern zoom lens?
Steven Tribe
10-Jan-2011, 04:34
It is just too symmetrical to be separation. Modern glues (if that is the case here) produce Newton's rings before edge symptoms.
Brian Ellis
10-Jan-2011, 15:28
Is that a modern zoom lens?
No, it's a 15mm Zeiss Contax Distagon.
Brian Ellis
10-Jan-2011, 15:30
Thanks for the replies. I know what balsam is but how would it overflow - because someone has tried to repair it in the past?
Thanks for the replies. I know what balsam is but how would it overflow - because someone has tried to repair it in the past?
It can happen during the assembly of the lens. Simply small surplus of the glue.
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