Product Description
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This filter fulfills the desire of many photographers for pure
lens protection without a filter effect. Its only function is to
keep dirt, sand, or splashes away from the front lens. The
extremely clear special glass with high transmission is
MRC-finished.
From the Manufacturer
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Clear Filters - Lens Protection with No Effect on Image Quality
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This filter fulfills the desire of many photographers for pure
lens protection without any filter effect. Its only function is
to keep dirt and moisture away from the front lens. Made from
special, extremely clear optical glass, B+W Clear filters exhibit
very high transmission values.
MRC - A Special Scratch-Resistant, Water and Dirt Repelling
Coating
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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 the 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 .
Click for larger view.
( https://images-na.ssl-images-.com/images/G/01/electronics/filters/schneider/F-Pro__Large._.jpg )
F-Pro Brass Filter
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This filter uses our standard B+W F-Pro filter , which 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.
- 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.