UVA Filter Kodak Wratten HELP for SCIENCE

[TheLitBull]

Guys, I'm doing a science project, using my Canon DSLR (T1I)


Here's an exceprt from a published research paper.

Equipment for the fluorescence photographs included
a Minolta X-700 camera body with a Tamron 90 rnm
macro lens. A Kodak Wratten #4 filter (Rochester, N.Y.)
was placed on the lens to block all UV light and pass only
visible light.

What is a Kodak Wratten #4 filter? Is #4 referring to the Kodak Wratten number, so like the lens that blocks yellow light?

 

[Derrel]

It is a yellow filter.

Here is an article on Wratten filter numbers.

Wratten number - Wikipedia, the free encyclopedia