B+W Filters 67mm KR1.5 filter

B+W UV Filter UV 010

This UV Filter blocks the invisible UV component of light from the sky, which can cause blur and to which many color films react with a blue cast.  These filters should be called UV-Blocking Filters, because there are filters for technical applications that pass UV radiation and block all the other wavelengths.  Nevertheless, the short term "UV Filter" has become established among photographers.  UV Filters are ideal for photography in high altitudes (in the mountains), by the sea and in regions with very clean air.  The pictures gain brilliance and disturbing blue casts are avoided.. Because the glass is colorless, color rendition is not altered, aside from the elimination of the unwanted blue cast, and 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, flying sand, sea water spray and the like, and it can be kept on the lens at all times.  It is recommended for analog color- and black- and- white- as well as digital photography.  UV Filters from B+W are also available in Slim mounts for wide-angle photography without vignetting.

B+W Skylight Filter KR1.5 (=1A)

This filter also blocks UV radiation, however it also has a delicate reddish-yellow tone designed to counter-act the high blue cast in the shadow portions of color photographs caused by light coming from a blue sky.  It produces a warmer image tone and reduces the haze in distant scenes.  The exposure factor amounts to only 1.1, so for practical purposes it ca be ignored.  Because of its very faint color, a Skylight Filter can be kept on a lens constantly for protection, as long as a slightly warmer color rendition is desired, as it would be with color reversal films that tend to produce cooler colors.