The Tiffen 77mm Deep Yellow #15 is commonly used for a noticeable increase in contrast with black and white films. It is also used to increase the separation of clouds and sky in black and white photography.
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I purchased this filter to use with my stash of color infrared film. Since it cuts more blue light than a number 8 yellow filter or a number 12 yellow filter, foliage appears more reddish. However, it still can have a somewhat blueish tint, compared a number 16 orange filter. I have not tried it with black-and-white film, yet.
Nice filter between standard yellow and orange. Being used on a Leica MM246 (monochrom) that produces only black & white images. Helps to stop down the MM246 that has a base ISO = 320. 77mm size is versatile when used with step up rings.