rguinter
7-May-2010, 13:31
Greetings:
I have a number of colored filters in various thread sizes that I use on my various MF and LF lenses. Many of them are labeled: Y1, Y2, Y3, O1, O2, G1, R1, etc.
Regarding the numbering system: specifically the Y1, Y2, and Y3 (yellow), does anyone know where I can find the percent transmission curves for these? I can see obviously that the Y3 is darker yellow than the Y2 which is darker than the Y1, etc.
But nowhere do I recall ever seeing transmission curves for the various ratings.
Would help me a bit with my shooting if I knew the cutoff values for some of these.
Many thanks to anyone who can help.
Cheers,
Bob G.
I have a number of colored filters in various thread sizes that I use on my various MF and LF lenses. Many of them are labeled: Y1, Y2, Y3, O1, O2, G1, R1, etc.
Regarding the numbering system: specifically the Y1, Y2, and Y3 (yellow), does anyone know where I can find the percent transmission curves for these? I can see obviously that the Y3 is darker yellow than the Y2 which is darker than the Y1, etc.
But nowhere do I recall ever seeing transmission curves for the various ratings.
Would help me a bit with my shooting if I knew the cutoff values for some of these.
Many thanks to anyone who can help.
Cheers,
Bob G.