B+W 092 has become a popular filter for IR photography with digital SLR cameras. This opaque filter acquires a dark purple color when held in front of a light source and blocks the visible spectrum (up to 650 nm). The filter passes only 50% of the light just below 700 nm. Between 730 nm and 2000 nm, the light transmission is more than 90%. Individual tests are always recommended when shooting with an IR filter.
B+W 093 blocks almost all visible light (up to 800 mm). The filter is dark red, almost black. With analogue IR film or IR-sensitive digital cameras, a fantastic effect is created especially for greenery and gives white leaves and a typical dark sky. Exposure values vary depending on the camera model used and are best determined by experimentation. The exposure time is usually a few seconds. Focusing is performed first without filters with IR focus correction.
A B+W 486 filter takes away unwanted UV and IR radiation. The filter is mainly recommended for CCD applications when the digital sensor is not equipped with IR protection filters. Other applications are video, digital photography and conventional black and white or color photography as well as technical applications. B+W 486 should not be used on lenses with an image angle wider than 60 ° (risk of the filter not giving the desired result).
The filter becomes part of the lens' optical system. Therefore, always choose a photo filter with optical properties that at least correspond to the quality of the lens. All B+W UV filters contain optical glass from German Schott of the highest quality.
B+W UV/IR filters are available with three different types of anti-reflective coating. Anti-reflex treatment is very important. An untreated filter glass reflects about 8-9% and lets through about 91-92%. In addition, reflections are created between the front and rear lens surfaces unless the filter is coated, resulting in blur and loss of contrast.
This means that the front and back of the filter glass have a layer of anti-reflection coating, which means that the light loss is only half compared to an untreated glass.
These filters have a full seven layers of anti-reflective coating on both filter surfaces and a protective layer, which is harder than glass, resists dirt, moisture and is extra resistant to scratches and cleaning. The MRC treatment of filters increases the light transmission to about 99%.
MRC Nano is a new type of anti-reflective coating with an extra "tight" top seal. On top of the 7 layers of anti-reflective coating, on both glass surfaces, B+W has laid a super hard surface which, thanks to nanotechnology, is very dense and resistant to soiling and wet. This means that all XS-Pro MRC Nano filters are easy to clean when needed and that water drops/mist do not get attached.
In order for a lens in an optical system to perform at its peak, it must be fixed in position. B+W manufactures several variants of filter sockets, mainly of brass and of outstanding quality thanks to own production on CNC machines.
Basic standard filter socket in black lacquered brass with accessory thread in front. Basic can be used on most lenses down to 24mm without vignetting occurring in 24x36mm format.
For more than 90 years, B+W filters have been synonymous with quality and innovation. B+W has succeeded in establishing itself as one of the world‘s leading filter manufacturers. It has, for example, made decisive progress in surface coating. B+W is the first filter manufacturer in the world to offer MRC (Multi Resistant Coating). MRC nano coating is the most innovative development in thin-layer technology. The world-famous Käsemann type polarizing filter with its outstanding quality has been produced by B+W since 1989.