- This filter uses our standard B+W F-Pro filter , which has a front accessory thread and is made of brass..
- MRC by B+W is not only an extraordinarily effective multiple layer coating, it is also harder than glass, so that it protects filters from scratches, and it is also water and dirt repellent, thus facilitating filter maintenance..
- Manufactured from Water-White Schott Glass.
Size:46 mm
Highly efficient standard circular polarizing filter
for all cameras with beam splitters in the light paths of their
TTL exposure meter and with autofocus lenses. Circular
polarization has the same pictorial effect as linear
polarization, but allows for proper exposure metering and/or
autofocus distance settings. B+W Polarizers increase color
saturation and reduce reflections. The neutral gray color and
plane parallel polarizer material guarantee optimal image
results. High-quality optical glass ensures excellent pictorial
quality. The filter factor varies according to how the filter is
positioned in relation to the sun. Filter factor is between 2.3
and 2.8.
From the Manufacturer
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Circular Polarizers - Increase Color Saturation, Reduce
Reflections
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Comparison of image with and without filter. ( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/5_1_Large._.jpg ) The images on the left was taken without any filter.
The image on the right was taken using a
B+W Circular Polarizer. Click for larger view. ( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/5_1_Large._.jpg )
Comparison of image with and without filter. ( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/5_2_Large._.jpg ) The images on the left was taken without any filter.
The image on the right was taken using a
B+W Circular Polarizer. Click for larger view. ( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/5_2_Large._.jpg )
Highly efficient standard circular polarizing filter for all
cameras with beam splitters in the light paths of their TTL
exposure meter and with autofocus lenses. Circular polarization
has the same pictorial effect as linear polarization, but allows
for proper exposure metering and/or autofocus distance settings.
B+W Polarizers increase color saturation and reduce reflections.
The neutral gray color and plane parallel polarizer material
guarantee optimal image results. High-quality optical glass
ensures excellent pictorial quality. The filter factor varies
according to how the filter is positioned in relation to the sun.
Exposure compensation is about two f-stops.
Linear and circular polarizers both consist of a linear
polarizer foil but differ in their construction in the following
way. Modern DSLR cameras have a beam-splitting prism that sends
part of the incoming light to the meter and part to the
viewfinder. The effect is that the light entering the meter is
partially polarized by the beam-splitter. A linear polarizer
placed on the lens of such a system will act as a second
polarizer and block light to the meter by a degree dependent on
the angle between the prism and the polarizer on the lens. The
result is incorrect exposure/aperture values from the meter. The
circular polarizer circumvents this problem through the addition
of a 1/4-wave retarder, or delay foil. This ensures that the
linearly polarized light is changed into a rotation that appears
unpolarized to the meter, resulting in proper exposure/aperture
readings.
MRC - A Special Scratch-Resistant, Water and Dirt Repelling
Coating
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Filter with half MRC coating and half conventional coating. The
left half of this filter has a
traditional coating. The right half
has MRC coating. The lens elements of high-quality lenses and
the plano surfaces of filters require a perfect shape and
smoothness to achieve the best optical quality. Dirt, greasy
fingerprints, water marks and scratches reduce the image contrast
and the sharpness, which can result in blooming at light sources
and have an effect similar to a soft-focus lens. A clean front
lens element and clean filter surfaces are therefore an absolute
pre-requisite for demanding photographers.
MRC coating causes water to bead up and slide right off. MRC
coating causes water
to bead up and slide right off. The MRC coating is first and
foremost a broadband anti-reflection coating. This means that its
reflection-reducing effect, which is thus also a
transmission-increasing effect, i.e. one which suppresses
scattered light and ghost images and transmits more light, has a
broadband action over the full spectrum. In contrast, the (almost
always blue) single-layer coating only has a high effect in the
medium wavelength range around yellow and yellow-green where the
eye is most sensitive to light, while its effect is greatly
reduced toward the blue-violet and purple-red end regions of the
visible spectrum. With the MRC coating, this blue, violet and red
to deep-red light cannot produce any contrast reducing scattered
light, spotty reflections or ghost images. A broadband effect can
only be achieved with a multilayer coating which requires a much
higher effort and precision because unevenness and irregularities
of the individual layers build up on one another and amplify one
another. Schneider therefore uses a plasma-assisted evaporation
coating process in which inert ions accelerated in an
electrical field compact the material deposited on the lens
surface in the vacuum chamber.
For photographers, the main advantage of MRC coating, is it's
ability to combat flare and ghosting. An added benefit is that
their filters remain free of dirt longer, so that they do not
have to be cleaned so often. When cleaning the filter does become
necessary, it is a lot easier to wipe off the dirt with a blower
brush, because of MRC's ability to repel dirt and moisture. This
also reduces the risk of micro-scratches which can occur during
cleaning.
Side view of F-Pro Rotating . ( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/F-Pro_Rotating__Large._.jpg ) Side view of F-Pro Rotating
. Click for larger view. ( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/F-Pro_Rotating__Large._.jpg )
F-Pro Brass Filter
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This filter uses a rotating B+W F-Pro filter for added
creative options. The has a front accessory thread and is
made of brass. Compared to the earlier standard , the F-Pro
, introduced in 2001, has become thinner. Now it can be used
with wide angle lenses, including most 24mm focal lengths on a
full frame body, without vignetting. Another advantage of the
F-Pro is its modified retaining ring, which is no longer
threaded in from the front, but holds the filter glass in place
from the back. When removing a filter or lens hood that has been
screwed on too tight to the filter, the retaining ring is not at
risk of loosening.