About the oil on the diaphragm, it is most likely paint. I've had a number of LF lenses in barrel with what appeared to be oil on the diaphragm blades. It never was. And yes, I looked at the listing.
About the oil on the diaphragm, it is most likely paint. I've had a number of LF lenses in barrel with what appeared to be oil on the diaphragm blades. It never was. And yes, I looked at the listing.
Well, it's intriguing. The Kern Dagors were made in Switzerland. This one is marked as being made in Germany. Red dot? a bottle of Testor's model paint could supply that. As for it being an Artar, the fastest (and shortest) Artars were f:9.
And oil on aperture blades is far from being a positive thing. It makes them reflective and means the lens needs to be stripped, degreased mechanically and optically and relubed preferably with something that won't separate and migrate.
One man's Mede is another man's Persian.
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