| B+W graduated color filters are primarily intended for color photography and are used mostly for photography on color transparency film. When color negative films are used, the processing laboratory should be informed, so it won't correct the effects from the image. But all B+W graduated color filters can, of course, also be used with black and white films, often with every interesting effects.
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B+W Graduated Filter Gray 501
The neutral gray half of this filter transmits 50% of the incoming light, so that it darkens the respective portion of the subject by one f-stop without altering its colors. For example, when the sky is too bright in relation to the landscape, this is an ideal amount for good detail rendition in the clouds and for preventing the sky from being “washed out” by over-exposure.
Note: The (501) and (502) series of filters are supplied in a rotating mount, similar to that of a polarizer.
B+W Graduated Filter Dark Gray 502
Because it attenuates the light twice as much as the 501 Filter, i.e. by two aperture stops (it transmits 25% of the incoming light), this graduated filter already produces quite dramatic effects. Because of the increased difference in brightness, it is even more important for the horizon line not to be positioned too far from the center of the image.
Note: The (501) and (502) series of filters are supplied in a rotating mount, similar to that of a polarizer.
B+W Graduated Filter Red 590
This graduated filter is often referred to as the " sun-set filter", because it can simulate a missing red sky in the evening or in the morning or to enhance one that is too pale when the line of sight is towards the sun. By the sea or by a lake, the horizon line should be positioned high enough for the red portion of the filter also to cover the reflection in the water.
B+W Graduated Filter Orange 524
The somewhat more delicate coloring of this graduated filter is recommended when the correction of the sunset mood is not to be too pronounced, or when a certain amount of red coloring is already present , so that only a small enhancement would be sufficient .With heavy gray thunderstorm clouds it can produce a nearly awesome storm mood.
B+W Graduated Filter Violet 543
With grazing light and a sparse exposure, this graduated filter with its somewhat unnatural color can produce a ghostly, macabre moonlight effect. So it is more suitable for abstractions rather than enhancements of natural moods. An interesting effect can be achieved by using it in combination with the graduated green filter 561 for the lower half of the image.
B+W Graduated Filter Tabac 550
Those who have experienced a sandstorm in the desert will never forget that mood. With this graduated filter, one can approximate that mood: slightly threatening, yet still pleasantly : "warm". The tobacco color is discreet, not overly colorful , so that it never appears gross nor overlay the existing colors as much as the other more intense gradated colors.
B+W Graduated Filter Green Filter 561
Because of its vegetation color, this graduated filter is especially suitable for the lower half of an image when used in combinations with other graduated filter that are being used to darken or to alter the color of the sky. With such filter combinations, the TTL exposure metering should be performed with the filters in position on the lens.
B+W Graduated Filter Blue Filter 581
This is an excellent solution when the sky isn't blue enough. It can be used effectively in combination with another graduated filter for the lower half of the image, so that in such a combination the sky will not be rendered too brightly or too pale. Example: sand dunes by the sea; using a graduated B+W Tabac Filter for the lower half and a graduated Blue Filter for the upper half of the image.
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