Gel Filters

[mdaddyrabbit]

Please explain to me what these gel filters are, how they are used with camera. Also what exactly what is needed to use them?

[chtgrubbs]

Gel filters are 3x3 or 4x4 or larger squares of optically clear gelatine which are dyed en mass to very strict tolerances. As far as I know only Kodak currently produces them. They are designed for technical applications such as studio color correction, copy work, or scientific work. There is a much larger selection avaible in gels than in glass or optical resin filters. However, they are very fragile and would not generally be used for normal photography. You would need a gel filter holder of some kind, usually a frame and screw in adapter.

[csnudelman]

Lee still makes gels.