marks on back glass of lens a problem?

"R. Mark Clayton" wrote

http://www.watchpolishing.com/antiscratch.htm

Neat web store, I was looking for that stuff forever,
munged the job in the meanwhile.

The watch case opener in the upper right is a good
thing to have in a large-format gadget bag / darkroom
for lens retaining rings.

Thanks. I missed the original post. This would be nifty
to try next time I find a lens of dubious character.

Collin

"Nicholas O. Lindan" wrote in message
ink.net...

"R. Mark Clayton" wrote

http://www.watchpolishing.com/antiscratch.htm

Neat web store, I was looking for that stuff forever,
munged the job in the meanwhile.

The watch case opener in the upper right is a good
thing to have in a large-format gadget bag / darkroom
for lens retaining rings.

I would not use this on any photographic lens or other
high quality optic. It will ruin a lens coating and will
disturb the figure of the lens.
There is no fix for scratched lenses other than
repolishing the surface. That can be done if the scratches
are not too deep, deep scratches can be polished out but may
change the thickness of the element enough to change the
properties of the lens.
Please do not cross-post any more.


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Richard Knoppow
Los Angeles, CA, USA