dap
12-Nov-2011, 22:33
Hi all,
I need some opinions on a lens that I have. I have a lens with a flaw in the glass but I can't quite peg what the problem is. The pattern is definitely located between a cemented pair (not on the lens surface).
All of the fungus I have seen before showed up as dense branching blobs - these seem more sparse.
All the cases of separation I have seen have been that obvious amber ring around the element or that diffuse rainbow sheen around the edge.
It almost looks like glue between the edge of the elements on this lens has fractured. Under the right type of lighting it looks like rainbow colored branches.
What do you think?
If it is fungus I might try to separate the cemented pair and clean/re-cement. If it is separation I'll just leave it.
Thanks
PS - that visible ring around the edge of the glass that looks like separation is just accumulated dirt/grime
I need some opinions on a lens that I have. I have a lens with a flaw in the glass but I can't quite peg what the problem is. The pattern is definitely located between a cemented pair (not on the lens surface).
All of the fungus I have seen before showed up as dense branching blobs - these seem more sparse.
All the cases of separation I have seen have been that obvious amber ring around the element or that diffuse rainbow sheen around the edge.
It almost looks like glue between the edge of the elements on this lens has fractured. Under the right type of lighting it looks like rainbow colored branches.
What do you think?
If it is fungus I might try to separate the cemented pair and clean/re-cement. If it is separation I'll just leave it.
Thanks
PS - that visible ring around the edge of the glass that looks like separation is just accumulated dirt/grime