what does "Copal drops" mean in describing lens

greg zinselmeier

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Hello,

any one have a clue as to what this means? If it is any help the lens in located in Japan. I have never ran acroos the term until today.

■ Optics
Beautiful condition.
There is a few dust. (No effect on photos)
There are copal drops. (No effect on photos)
There is no fog.
There is no fungus.
There is no scratches.
There is no separation.


what does this mean?
 

BrianShaw

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Probably a bad translation of “Schneideritis”.
 

Vaughn

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It affects only the perceived value of the lens...no affect on image quality.
 

BrianShaw

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Some other terms from Japanese sellers in reference to front lens group: cobweb drops and edge drops.
 

reddesert

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"Copal" is a word meaning a type of tree resin or amber. It is possible that this is a machine translation for oil or grease spots or coating marks, and doesn't directly have to do with Copal shutters, oddly enough. Similarly, the odd terms BrianShaw mentioned of cobweb drops and edge drops could be machine translations of something related to the web-like appearance of fungus, and of edge markings (who knows, maybe "edge drops" is what we call Schneideritis).

I have not been able to learn where the Copal shutter company got its name within a little bit of internet research. The name is given at camera-wiki.org http://camera-wiki.org/wiki/Copal "In 1949 the company was established as K.K. Copal Kōki Seisakusho (株式会社コパル光機製作所, meaning Copal Optical Works Co Ltd)." Here "Copal" or "Coparu" is written in katakana as コパル , the use of katakana indicates that it's a word borrowed from a foreign language and transliterated. I don't know if "copal" as used in Japanese has a broader meaning than it does in English.
 

removed account4

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is it a Schneider symmar convertible? might refer to schneideritis ( like they said )
... when flecks of the black paint inside the lens are flaked off
 

BrianShaw

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Fujiitis is Fuji’s version of Schneideritis... which is clearly seen in that lens. Nothing to worry about but could mean that a low-bid offer might be accepted.
 
OP
OP

greg zinselmeier

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Thanks Brian, that’s what I thought too. But I think I’m gonna go with rodenstock 90mm f6.8 although at f22. It really doesn’t matter which lens I choose for B&W!!
 

Neil Poulsen

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greg zinselmeier said:
correct me if i'm wrong Schneideritis does Not effect iamge quality correct?
Click to expand...

I sure wouldn't bet on that. What with all that random light ricocheting around inside the lens? Those silver specs of missing paint have to be huge light emitters.

I used to have a 180mm Symmar-S with Schneideritis, and I used to preach that this affliction would have little effect on image quality. Then . . . I started to think about it. Are you kidding me?

Call me a skeptic.
 

grain elevator

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Wait, if it refers to a tree resin, couldn't it likely refer to the canada balsam that is used to cement lens elements? That is a tree resin. So it might also refer to balsam separation or something like that?
 
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