B+W Polfilter High Transmission cirkular MASTER | Ø 72 mm
Special polarization films optimize the translucency of the filter
- B + W Master - Brass version
- Extra narrow, very suitable for wide-angle lenses
- Front thread for further accessories, Restable lens lid
- MRC nano for the highest demands
- B + W Typical precise top quality
- Made in Germany
Radiant white clouds against deep blue sky or sadded autumn colors are no coincidence. Circular polarization filters (short: pole filter) increase the purity of the own colors and increase the color saturation. CPL Filters are among the most important photography filters. They are rotatable in the version; Thus, the deletion effect can be regulated in the viewfinder or the display recognizable. Maximum effect is achieved at a recording angle of 90 ° to the sun. For a uniform effect in the image, 18 mm in the APS-C format or 24 mm in the small-scale format should not be lessed. The second use of polar filters is the reduction of reflexes on non-metallic surfaces (water, shop window, paint). Items behind it, also font behind reflecting paint, will be recognizable again - a fascinating image improvement without image processing. For this high-end pole filter, the film pieces for highest color neutrality are selected. After the procurement between high-quality cover glasses, an additional grinding and polishing process takes place. This ensures superior sharpness even with very bright, apochromatic lenses. Recent procurement technology ensures long-term stability even in humid climates.
High Transmission Circular Master Polfilter offers you the following product benefits: Due to the higher light transmittance (transmission), the new high transmission circular master absorb correspondingly less light and achieve a brighter search picture. Due to the low light loss faster exposure times are possible. Circular polarization filters increase the purity of the own colors and increase the color saturation. They are rotatable in the socket, so the extinguishing effect of a reflection in the viewfinder or on the display can be easily regulated. The filter factor of polarization filters is usually between 4 and 8. That corresponds to up to three diaphragm levels. The B + W High Transmission Circular Master has a filter factor of 2 to 3, ie 1 to 1.5 diaphragm levels. The new pole filters are circular and thus suitable for all camera systems with built-in exposure meter and AF systems.
B + W | MASTER filter mount
The MASTER filter mount has a high mechnische stability at still very low overall height. It can be used on the most popular wide-angle lenses without vignetting. Exact details regarding focal length and angle limit are not possible yet because vignetting depends not only on the filter height and the angle of view, but also from the Tubuskonstruktion the lens. As a guide for safe use of vignetting 24x36 mm lenses can mm with a focal length from 17 and APS-C lenses from 10 mm (about 63 ° diagonal angle of view) in full-frame. Despite the low overall height more filters, snap cap or sun visor and can easily be securely fastened to the front thread. The filters of the MASTER line are characterized by a newly designed rotating ring with optimized design for better grip. All versions of the B + W MASTER Line filter are precisely made of brass. Brass is known for its dimensional stability and robustness. By a specific functional coat smooth screwing and unscrewing of the filter is guaranteed. The filter glass is play and tension in the brass mount and thus optimally exactly plane, which highest imaging performance guarantees. The filter mount is hard chrome plated matt black. This prevents the possible effects of reflections on the socket. Another advantage of the master's socket: The filter glass is no longer fixed from the front, but from behind with a screw-in ring. This can not loosen up with too tightly screwed up additional filters or sun visors of screwing while unscrewing.
B + W | MRC nano coating
An essential criterion for an excellent filter is the coating. Quality starts in front of the lens, and there is known to be the filter. A filter must not restrict the performance of an optics. MRC (Multi Resistant Coating) - Remote Filters have on both sides a multicoating layer (7 + 1 each), which ensures maximum anti-reflection and thus eliminate disturbing stray light. This allows brilliant colors and higher contrasts to be achieved. Due to the low residual reflection (0.5%), MRC reliably avoids ghost or double images that can be caused by back reflection from the image sensor. In addition, MRC protects the filter from scratches due to increased layer hardness and thus preserves the high optical quality. In addition, MRC is dirt and water repellent. Cleaning gets easier. In MRC Nano, the outer layer was reinforced in effect. The property based on nanotechnology (lotus effect) achieves a better apromination of water. So the cleaning of the filter surface succeeds even easier and faster. The hydrophobic surface reduces the fog fitting. At transition from cold in warm environment, the fitting detaches within a short time from the filter glass surface.
