B+W Filter Red Dark 630 | 091 | MRC BASIC
The filter generates dramatic effects and extreme sound separation for a graphical effect
- 091 red filter dark 630
- BASIC filter entry | Brass
- MRC compensation for the highest demands
Compared to the lighter B+W 090 red filter 590, the B+W 091 red filter 630 still brings an increase, because it even darkens the red in the spectrum near yellow and its transparency starts only in the OrangeRot.
B+W | Basic filter
The basic line filters are characterized by a newly designed rotary ring with optimized design for better grip. The filter frame is made of sturdy brass and is provided with a special functional paint for smooth unscrewing and unscrewing.
The production of all B+W filters takes place in Germany at the highest level with minimal tolerances.
The base material of the filter detection is made of brass; Guarantee for high stability and longevity. The special function lacquer makes it easier with its optimized sliding properties to engage and unscrew the filter. The basic filter detection has a high level of engineering while still low overall height. It can be used at the most common wide-angle lenses without a vignational test. Exact information on the focal length or image angle limit is still not possible because the vignetting does not depend not only by the filter height and the image angle but also from the tube construction of the lens. As a guide for a safe vignetting-free use, in full format 24x36 mm lenses with a focal length from 24 mm and APS-C lenses from 18 mm (about 63 ° diagonal image angle) apply. Despite the small height, additional filters, snap lid or sun visor can be easily and safely attached to the front thread. The filter glass is playful and stress-free in the brass version and thus optimally exactly plan, which guarantees the highest imaging performance.
Another advantage of the basic version: 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 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) 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.
