Kenko
49mm W3 81B Color Conversion Lens Filter

81A / 81B / 81C Color Conversion Lens Filter

These are light balancing filters used to decrease the color temperature slightly for a warmer (redder) tone. Corrects the tendency toward bluish tones. For example, the 81A should be selected when using tungsten Type B color film (3200°K) with photoflood lamps (3400°K) These filters can be used together.

Unlike other polarizing filters, model PL WIDE is made ​​in a thin rim (width of 5 mm), which reduces the risk of vignetting when used with wide-angle lenses. The filter can be used to increase colour saturation, will help to make deeper blue sky, highlight the white clouds, and effectively eliminate reflections from non-metallic surfaces, such as glass or water. The filter does not change the overall colour balance of the picture and will be effective for both the amateur and the professional photography.

W3 81B Color Conversion Lens Filter

81B - Used primarily as a “warming” filter, Stronger than the 81A, the 81B decreases the colour temperature of a scene even more.