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The Formatt 4 x 4" Dark Yellow 9 Filter is commonly used for a noticeable increase in contrast with black and white films. When your black and white images are flat, throw on a contrast filter.
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.
Formatt, a company with three generations of professional filter-making experience produces every filter to the highest technical standards. The finest materials, together with state of-the-art production technology have resulted in a standard of optical excellence unmatched anywhere else.
Especially useful for added contrast between blue sky with clouds and foreground
Absorbing Cell Technology
The secret to Formatt's consistency in filter design lies in its unique "Absorbing Cell Technology" (A.C.T.); this unique process allows color correct dyes to be applied to optically pure, wafer thin absorbing cells and offers a controllability that ensures the smoothest grad lines and consistent color across the whole filter surface
This process is revolutionary compared with conventional filter dying techniques by eliminating the need to directly coat the glass surface itself; the repeatable performance gained through A.C.T. ensures that at any time you have to swap like filters for like filters mid shoot you can do so with confidence with no discernable differences in color or density
Each filter is guaranteed flatness to a maximum 2-wave value and comes with an individual reading from a laser interferometer; every filter is carefully verified with a densitometer and spectrophotometer to ensure consistent and accurate transmission, before leaving the factory - the result is an absolute purity of image that eliminates any unwanted colorcast caused by conventional greenish soda-lime glass
In the Box
Formatt Hitech Dark Yellow 9 Filter (4 x 4")
Table of Contents
4 x 4" (100 x 100mm, 4mm thick)
2 (+1 stop)
Contrast control, enhanced skin tones, tonal corrections and more dramatic landscapes; noticeable increase in contrast with black and white films
Offers the most correct tonal range contrast to produce natural clouds against blue skies