The B+W 77mm Black (093) Infrared Filter blocks the entire visible spectrum, so to our eyes it looks completely opaque. Iit makes pure infrared photographs possible without the visible red component. Its transmission only begins to exceed 1% at 800 nm, rising to 88% at 900 nm, & remains that high far beyond the upper limit of sensitisation covered by infrared films. This filter is used less frequently in pictorial photography because of the dramatic loss of effective ISO. But in the scientific field, materials research & forensics, the limitation to a strictly infrared range is often important. The filter factor is very dependent on the illumination & on the characteristics of the film. ...

The B+W Circular Polariser MRC Digital Filter increases colour saturation & reduces reflections. Circular polarizing filters are made for all cameras with beam splitters in the light paths of their TTL exposure meter & with autofocus lenses. Circular polarization has the same pictorial effect as linear polarization, but allows for proper exposure metering and/or autofocus distance settings. ...

The B+W Circular Polariser XS-PRO Digital Filter increases colour saturation & reduces reflections. Circular polarizing filters are made for all cameras with beam splitters in the light paths of their TTL exposure meter & with autofocus lenses. Circular polarization has the same pictorial effect as linear polarization, but allows for proper exposure metering and/or autofocus distance settings. ...

The B+W Clear Glass XS-PRO Digital Filter fulfils the desire of many photographers for pure lens protection without a filter effect. Its only function is to keep dirt, s&, or splashes away from the front lens. The extremely clear special glass with high transmission is MRC-finished. ...

The B+W 77mm Clear UV Haze (010) Filter blocks the invisible UV component of light from the sky, which can cause blur & a blue cast. UV Filters are ideal for photography in high altitudes (in the mountains), by the sea & in regions with very clean air. Because the glass is colourless, colour rendition is not altered, aside from the elimination of the unwanted blue cast, & no increase in exposure is required. That makes a UV Filter very suitable as protection of the front element of the taking lens against dust, s&, sea water spray & the like, & it can be kept on the lens at all times. ...

The B+W 77mm Close-Up +3 (NL3) Filter provides a near-focusing distance that begins at 33cm (13 inches) from the front rim, regardless of the focal length of the main lens. When close-ups have to be taken because of the wide-angle effect of a 35mm lens, the NL 3 close-up lens is ideal for a seamless extension of the normal close-up range up to Approx. 1:5.5. ...

The B+W 77mm Close-Up +4 (NL4) Filter is the right power for closer focusing with a 50mm lens (up to Approx. 1:3) when you have reached the limit with the NL 2 lens. With 85mm (up to Approx. 1:2.1) & 100mm (up to Approx. 1:1.9) telephoto lenses, it is the highest power, & it should be used with the main lens stopped down to at least f/8. ...

The B+W 77mm Close-Up +5 (NL5) Filter serves for the seamless extension of the range provided by the NL 3 close-up lens on a 35mm main lens (up to Approx. 1:3.5). If you can tolerate a small gap after the NL 2 close-up lens on a 50mm main lens (approximately 1:4.4 to 1:4), then you enter a little further into the macro range with the NL 5 instead of the NL 4 (up to Approx. 1:2.6). ...

The B+W 77mm Dark Red (092) Infrared Filter, which looks dark purplish red when held in front of a light source, blocks visible light up to 650 nm & passes only 50% of the radiation just below 700 nm (thus the dark red colour). From 730 nm to 2000 nm, transmission is greater than 90%. This makes photographs of pure red & infrared images possible with the best utilisation of the relatively low sensitivity of infrared films. As the sensitisation of infrared black-&-white films barely extends beyond 1000 nm, the red portion that is transmitted still makes a relevant contribution to the exposure. That is why this filter is the preferred filter for pictorial photography on IR black-&-white film. Its filter factor is 20 to 40. ...

The B+W 77mm F-Pro HTC Kaesemann MRC Circular Polarising Filter is a high-transmission filter for lenses with a filter thread diameter of 77mm. This filter provides all of the benefits of a polarising filter Â- reflection reduction, richer colours, & greater control of depth-of-field & shutter speed. An MRC nano coating also protects the glass element from water damage. ...