52mm 81B Slim Filter
Colour Conversion Filter
The 52mm 81B Slim Filter from Heliopan is a colour conversion filter that works to control the bluish colouration that affects daylight film. This salmon coloured filter can be used to bring skin tones back to a flattering tone when the light changes during the day. This is particularly useful under cloudy or open shade conditions since as the light changes, so does the colour temperature.
An 81B will decrease the colour temperature by approximately 100 degrees Kelvin more than an 81A filter. The cloudier the day, the warmer the filter required to eliminate the blue tint often found on such days. An 81B can also be used with electronic flash to reduce the amount of "blue" generated by the flash.
The filter uses Schott glass, to ensure your images are sharp and clear, with true colour and contrast. The brass mounting ring is built with a slim mount design that helps to prevent vignetting when used on wide-angle lenses.