My contact frame needs new glass.

[Drew Wiley]

Sal - the kind of effect which Ron referred to is analogous to unsharp masking, in which relatively subtle difference in diffusion material or thickness, or any added
diffusion characteristics of glass itself can accumulate noticably. One can easily overmask in the sense of too much edge effect or an actual dimensional accentuation. The younger crowd might think that unsharp masking is a term invented by Photoshop, but it's been around for a long time. Some of the old graphic
arts manuals go into the details. Sometimes even switching the brand of diffusion
sheet, or from mylar to acetate, will make a significant difference. I buy the sheet
materials in quantity, look for blemishes on a lightbox, then grade and sort out the
working sizes. In color printing these tricks are really useful to know, but sometimes
also in black and white work.

[eli]

I have both a 4x5 carrier, which needs glass and a scanner which I am salvaging parts from. Would the glass from the scanner be a suitable replacement for the original Omega glass?

Eli

[mcfactor]

On a somewhat related note, has anyone used the Print File Custom Negative Proofer? http://www.bhphotovideo.com/c/produc...m_Proofer.html
I realize it doesnt have AN glass, but I havent really had problems with newton rings yet. It seems like a very easy (and inexpensive) option.

[Tim k]

Thats the funniest thing I heard all day. I love it. I almost wet myself.

Thanks for the laugh.

After thinking about my post for a while, I felt compelled to say that I thought that it was funny that you "kinda" broke it, not that you broke it.