View Full Version : Piece of blue glass on a string?

01-30-2009, 05:38 PM
I was just going through an old LF setup I bought off of e_ay and found a piece of deep blue glass not quite 2" in diamater hanging from a string. Its just a piece of glass. I've stumbled across these before and I'm wondering if people used these for metering before modern light meters.
Any ideas?

David A. Goldfarb
01-30-2009, 05:45 PM
That's probably a monochrome viewing filter. Zone VI sold one. The idea is that you can look through the filter to get a better idea of the tonal relationships that B&W film sees.

P.S.--it's okay to say "eBay" here.

01-30-2009, 05:47 PM
Actually they are used for helping to visualise the scene in B&W. This works to show it like blue sensitive film will see it