what is a yellow green filter for ???

haagen_dazs

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I am in possession of a yellow green filter and ..
I am wondering what is it for?

I did a search and it seems like it is sold for B/W film shooting.

Please enlighten me.
Do you have any samples of a photos taken with a yellow green filter?
 
Mark,
For black-and-white film, a yellow-green filter does the following:
Lightens skin tones (including pleasing textures for non-caucasians)
lightens foliage -- trees and green leaves
darkens blue skies
brings out a bit more detail in overcast skies.
Generally improves contrast.

I did b&w newspaper work for more than 15 years and kept yellow filters permanently on every lens.

Today I shoot the C41 black-and-white films and notice that they already have pleasing contrast, so I don't use the yellow filters as often as I used to.
 
Try some shots with and without it and see it the difference is important to you. I'd definitely try it it on outdoor scenics that include blue skies or greenery.
 
If you're using conventional B&W, I find that a light yellow to medium yellow to be very helpfull with contrast. There are many different ways that are used to designate the filters - work off of the filter's filter factor for comparisons - I like ones in the 1.5 to 2.0 range.

As Vince mentions, C-41 B&W doesn't need a filter as much. If you do use one, it'll act like one one step darker (a yellow acts like an orange). Also, you need to experiment with the film you use. My prefered combination outdoors is Plus-X with a Y2 filter rated at EI400 and developed in Diafine. That's not an especially standard combo, but I find the results pleasing. You need to find your own equivalent of what _you_ like.

William
 
C-41 is black and white film that is processed using standard colour print chemistry, such as the machines found in one-hour photolabs. The Kokak version is usually just labelled "black and white". Ilford XP-2 is comparable.

Basically, it's black and white film for those who don't want to do their own in-home processing. It's also very fine grain with extremely wide latitude (useful for those of us who consider light meters to be an optional nuissance).
 
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