No Leica R forum? Lens question.

[Beemermark]

Just bought this lens on eBay. Been sort of wanting it for a very long time and this one popped up at a very good price because of the artifacts on the lens. I've seen these artifacts on other lenses I've owned but have never figured out what causes them. They never get worse and are too insignificant to impact the image. My thoughts are that are either lens cement that was a little to thin to spread to the edges uniformly or ??

 

[Forest_rain]

I have some lenses like that, always little bubbles on the corners. Maybe out of the image circle so I don't notice any image difference.


From what I understand it's cement coming apart from an old lens with the cement breaking down between two lens elements.

 

[Mackinaw]

There's something called "Schneideritis," which is when a lens loses some of the blackening along the edges. First noticed, i guess on Schneider lenses, but this seems to common to every lens manufacturer. Several lenses I own are so afflicted. Seems to have no impact on lens performance.

Jim B.

 

[Beemermark]

There's something called "Schneideritis," which is when a lens loses some of the blackening along the edges. First noticed, i guess on Schneider lenses, but this seems to common to every lens manufacturer. Several lenses I own are so afflicted. Seems to have no impact on lens performance.

Jim B.

I've had two Minolta CL 28mm lenses afflicted with "Schneideritis,"but they were white spots. One was quite bad over all the lens surface but they had no affect on the final image. I only sold the last one because I picked up a 29 Elmarit that I liked for other reasons better. In 30+ years I've never seen a definitive answer as to what causes "Schneideritis," or the example in the picture.