filtration for ortho films? suggestions pleasegreenspun.com : LUSENET : Large format photography : One Thread
I am using a sort of ortho film, does not see red. I am shooting a scene that includes blue sky and white clouds. Does anybody have a suggestions for filtration that would make those clouds stand out.
Using my usual tri-x I would use a red #25. but I would receive blank image with this film. I have tried my polarizer with some success.
I think I may run a test this afternoon. Four images, no filter, blue filter, yellow filter and green filter.
-- paul schuster (firstname.lastname@example.org), July 08, 2000
You could possibly try a grey or N.D. grad filter to help bring out the sky. also you may try one of the weirder filters from Lee - e.g. lilac.
-- David Kirk (David_J_Kirk@hotmail.com), July 08, 2000.
Use a yellow or green.
-- William Marderness (email@example.com), July 08, 2000.
With ortho film which is sensitive to blue light, the sky would be white because of the blue sky. The clouds would fade into nothing. A red filter will cut the blue light so the clouds should stand out. But why are you using this film for your sky/cloud study? Use a red filter with normal film, underexpose by a stop or two more than normal and polarize the sky for a deep black sky and contrasty clouds. James
-- james (firstname.lastname@example.org), July 09, 2000.
The standard filtration for ortho under those conditions a generation or two ago was a Wratten k1 filter, equivalent to a modern #6
-- John Lehman (email@example.com), July 10, 2000.