B+W 58mm Circular Polarizer with Multi-Resistant Coating

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Circular Polarizers - Increase Color Saturation, Reduce Reflections


The images on the left was taken with no filter.
The image on the right was taken using a
B+W Circular Polarizer. Click for larger view.

The images for the left was taken without any filter.
The image on the right was taken using a
B+W Circular Polarizer. Click for larger view.
Highly efficient standard circular polarizing filter for those cameras with beam splitters within the light paths of these 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 minimizing 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 in accordance with how the filter is positioned in relation for the sun. Exposure compensation is all about two f-stops.

Linear and circular polarizers both consist of your linear polarizer foil but differ of their construction within the following way. Modern DSLR cameras possess a beam-splitting prism that sends part in the incoming light towards the meter and part on the viewfinder. The effect is that the sunlight entering the meter is partially polarized by the beam-splitter. A linear polarizer placed on the lens of this type of system will act as being a second polarizer and block light for the meter by a degree dependent about the angle between your prism as well as the polarizer about the lens. The end result is incorrect exposure/aperture values in the meter. The circular polarizer circumvents this issue through the addition of the 1/4-wave retarder, or delay foil. This ensures how the linearly polarized light is changed right into a rotation that appears unpolarized for the meter, leading to proper exposure/aperture readings.

MRC - a Special Scratch-Resistant, Water and Dirt Repelling Coating
The left 1 / 2 of this filter has a
traditional coating. The right half
has MRC coating.
The lens elements of high-quality lenses and also the plano surfaces of filters require a great shape and smoothness to accomplish the best optical quality. Dirt, greasy fingerprints, water marks and scratches reduce the image contrast as well as the sharpness, which can lead to blooming at light sources and have an effect comparable 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.
The MRC coating is first and foremost a broadband anti-reflection coating. This means the reason is 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 in the full spectrum. In contrast, the (almost always blue) single-layer coating only features a high effect inside the medium wavelength range around yellow and yellow-green in which the eye is most sensitive to light, while its effect is 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 are only able to be performed which has a multilayer coating which needs a better effort and precision because unevenness and irregularities in the individual layers build through to each other and amplify one another. Schneider therefore runs on the plasma-assisted evaporation coating process by which inert gas ions accelerated in a electrical field compact the fabric deposited on the lens surface inside vacuum chamber.

For photographers, the principle advantage of MRC coating, is it's ability to combat flare and ghosting. An added benefit is always that their filters remain without any dirt longer, to ensure they are doing donrrrt you have to be cleaned so often. When cleansing the filter does become necessary, it is really a lot better to wipe from the dirt using a blower brush, because of MRC's ability to repel dirt and moisture. This also decreases the probability of micro-scratches which may occur during cleaning.


Side look at F-Pro Rotating
Mount. Click for larger view.
F-Pro Brass Filter Mount

This filter uses a rotating B+W F-Pro filter mount for added creative options. The mount includes a front accessory thread and is manufactured from brass. Compared towards the earlier standard mount, the F-Pro mount, introduced in 2001, is now thinner. Now it might be used with wide angle lenses, including most 24mm focal lengths on the full frame body, without vignetting. An additional advantage with the F-Pro mount is its modified retaining ring, which is no more threaded in from the front, but supports the filter glass in position from the back. When removing a filter or lens hood which includes been screwed on too tight towards the filter, the retaining ring just isn't at risk of loosening.
High Quality German Filters



Brass Ring for higher Quality Image
Highest possible polishiing technique
World's best optical glass
New thinner Pro mount. No vignetting
USA Warranty