-Contrast filters - filters used in black and white photography to darken or lighten the films rendition of particular colors in the subject.
USING CONTRAST FILTERS
Single-coloured contrast filters can be used on your DSLR to give better monochrome shots, but you may have to set the camera to black & white. You may also have to shoot JPEGs depending on your camera.
Contrast filters should be used for black-and-white photography for which of the following reasons 1. To exaggerate a color 2. To reduce a color 3. To eliminate a color 4. Each of the above 2-49.
The Tiffen Ultra Contrast filters are intended to reduce the contrast of an image. They are made of milky white glass (like a dirty window) that will bring up the value of the shadows in an image.
The methods here are not using polycontrast filters- see split-filter printing- but are the same methods used with filters, or with graded papers. Probably the single most important part of testing is to strictly follow processing times.
In the printing process you can try to fix this with high contrast filters that but overall you will end up loosing a lot of the grayscale. There values look unnatural compared with that of a well exposed negative.
B&W Photography
More black & white photography
Black and White Still life
Black & White Contrast Filters
Color photography ...
VARIABLE CONTRAST PAPER - Photographic paper of differing grades of contrast when exposed through special contrast filters.
There are six major types: Y (Yellow), Y/G (Yellow/Green), G (Green), O (Orange), R (Red) and the not so frequently used B (Blue), for portraits, to strengthen skin tones and bring out more detail in faces. Contrast filters improve the separation of ...
 See also: Contrast, Filter, Exposure, Filters, Photograph
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