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Meaning of Red dot on a Leitz eyepiece?
Posted: Thu Dec 05, 2019 5:31 pm
by Chris__R
I have one which is a high eyepoint, which I believe means it's for afocal photography - is that right?
A second is on a plain-looking Leitz Wetzlar Periplan GF 10x eyepiece. What does the red dot on that mean?
I know GF is wide field.
Re: Meaning of Red dot on a Leitz eyepiece?
Posted: Thu Dec 05, 2019 7:23 pm
by wporter
High eyepoint eyepieces are generally meant for people who wear eyeglasses, so they don't bump their glasses into the eyelens of the eyepiece.
The red dot seems to indicate a Leitz eyepiece that is best for photography; perhaps this means that it is a projective eyepiece (not for afocal), but there seems to be some question as to whether these eyepieces are much different from the same undotted ones.
Any Leitz experts out there?
Re: Meaning of Red dot on a Leitz eyepiece?
Posted: Fri Dec 06, 2019 1:40 am
by apochronaut
Red dots or lettering have been used by some companies to indicate strain free for pol applications. I'm not sure whether a convention has developed but in the case of objectives; black barrels with red lettering or a dot is pol indicative.