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Описание
The B+W 49mm Light Red MRC 090M Filter can be used to increase image
contrast when photographing using a film camera system with black-and-white film
installed.
This filter's effect corresponds to that of a Wratten 25 filter. Wavelengths
of visible light that are apparent as green and blue colors to the human eye are
suppressed, while visible light associated with yellow, orange, and red colors
are able to more easily pass though the B+W 49mm Light Red MRC 090M Filter and
into the lens it is mounted in front of. When photographing with this filter
along with black-and-white film, green to blue-colored subjects within a scene
are reproduced in very dark shades of grey than if a filter was not used.
Simultaneously, yellow to red subjects are rendered in very light shades of
grey.
When applied to black-and-white photography, the increased contrast provided
by the B+W 49mm Light Red MRC 090M Filter can result in very dark skies with
extremely defined clouds. Shades of green among foliage can become strongly
differentiated from neighboring shades of yellow, orange, or red, while light
skin tones can be rendered as white or near-white. Additionally, this filter can
also minimize the presence of haze caused by the bluish cast of daylight.
To prevent internal ghosting and reflections, each glass surface includes
eight layers of anti-reflection coating. This Multi-Resistant Coating (MRC) also
offers greater protection to the filter substrate and helps it to stay clean for
longer than with uncoated filters. B+W filters are constructed from Schott glass
for increased optical clarity. This filter features an F-Pro brass filter ring
for durability as well as jamming prevention .
Filter
Factor/Density
0.7 (2.3
Stops) 5x
Circular Size
49 mm
Front
Accessory Thread / Bayonet
49 mm
Filter
Material
Glass
Coatings
Multi-Coating
Grade
Equivalent
to Wratten 25
Color Type
Black-and-White Contrast