I'm looking at a lens and there are some small spots around the perimeter of one of the inner rear elements where the glass meets the place where it is set in place. They don't look like fungus. They are a milky clear color if there is any color at all. Is this just aging of the glue/cement? How common is this? I have seen it in several lenses (I don't have the lens I am talking about right now, so I can't show you a picture).
you mean "schneideritis"? are they bubbles-looking?
Yes, but they are slightly larger than what I have seen people call Schneideritis. I'd say they are about 1-2.5mm wide.
Sounds like the beginning of lens separation. Can't say for sure without seeing the lens.
I got em on a couple....they don't seem to be doing anything bad...except maybe causing some flare that I haven't noticed yet---the ones I got are not visible to the light rays that travel through the lens...so I guess it's benign signs of old age.....
maybe "age spots"....
Schneideritis.
One man's Mede is another man's Persian.
What are the effects of schneideritis ?Originally Posted by E. von Hoegh
Reduced resale value.What are the effects of schneideritis ?
One man's Mede is another man's Persian.
I thought Schneideritis was tiny little spots on the paint inside the lens. These spots are more where the glass is cemented in place. Perhaps there are variants of Schneideritis that are this instead.
Thanks for the help folks.
Most of the separated lenses I have dealt with have more of a crescent shape irregularity. Sometimes things like you describe wipe right off. But sometimes they don't
I usually check so see if light passes through the abnormal area at f22. If not then I don't worry. If light passes through that area at f22 at any part of the image circle, I'd go after it and give it a shot to see if it will wipe off.
Posting Permissions
Reply With Quote
Bookmarks