filter	color	                     use

1B	lt. pink	(skylight) cuts blue cast in shade and distance, absorbs UV
UV(0)	none	absorbs UV
80A	blue	color correction for daylight film under 3200K (studio) lamps
80B	blue	color correction for daylight film under 3400K (photo) lamps
80C	blue	color correction for daylight film under 3800K (clear flash) lamps
81A	amber	color correction for Type B tungsten film under 3400K (photo) lamps
81B	amber	to remove blue cast in shaded daylight
81C	amber	to remove blue cast in cloudy/rainy weather
82A	blue	color correction for Type A tungsten film under 3200K (studio) lamps
82B	blue	color correction for Type B tungsten film under 2900K (100w incand.)
82C	blue	to remove reddish cast in early morning or late afternoon
85	amber	color correction for Type A tungsten film in daylight
85B	amber	color correction for Type B tungsten film in daylight
85C	amber	converts 5500K (daylight) to 3800K lighting
FL-day	purple	converts daylight fluorescent light for daylight film
FL-W 	purple	converts white fluorescent light for daylight film
K2	yellow	improves contrast in B&W; absorbs UV and part of violet
G	orange	greatly improves contrast in B&W; absorbs UV and part of blue-green
25A 	red	strongest B&W contrast; absorbs UV and part of yellow; "night filter"
X0	yel-grn	natural rendition of skin and lips of female models    B&W?
X1	green	Absorbs more red than X0, good for green trees       B&W?