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The Formatt 40.5mm Deep Yellow-Green 15 Glass Filter is commonly used for a noticeable increase in contrast with black and white films.
The #15 yellow is a bit more contrasty than the #13. Contrast in black and white is generally controlled by yellow, orange and red filters with red producing the greatest contrast. Moderate changes can be accomplished with yellow which can, generally, bump up the contrast just enough to make the difference between a "muddy" print and an acceptable image.
Enhances landscapes, marine scenes and aerial photography with more effect than a Yellow 13 filter
In the Box
Formatt Hitech 40.5mm Deep Yellow-Green 15 Glass Filter for Black & White Film
Table of Contents
3.3 (+1.3 stop)
Renders sky dramatically darker
Suitable for landscapes and nature scenes; Reduces excess blue of full moon in astrophotography