B+W 67mm KB-15 SC (80A) Color Conversion Filter - Schott Glass MPN: 65-030592
B+W KB-15 (80A) Color Conversion Glass Filter
The slightly denser B+W KB15 (80A) Color Conversion Glass Filter is recommended for daylight color reversal film with artificial light from the popular 60-100W halogen bulbs commonly used in lights aimed at the ceiling. With weaker incandescent bulbs, there will again be that pleasant warm tone for moody interior photographs.
Let's say you're at a family gathering and you've brought your camera and want to take some photos of this once-a-year gathering. You have traditional daylight balanced film but find yourself in a room filled with table lamps. If left unfiltered, your photos will turn out yellowish. Under certain circumstances, perhaps a nice effect but not flattering in terms of skin tones or what our eyes are used to seeing or expecting.
This filter allows you to "balance", i.e. bring back, correct color tone to your images. There is some loss of film speed that may require the use of a tripod but, at least, your photos will demonstrate the proper tonality they so richly deserve.
80 Series Color Conversion Chart
80A increases color temperature from 3200-5500 Kelvin (commonly used with 3200K lamps)
80B increases color temperature from 3400-5500 Kelvin (commonly used with photoflood lamps)
80C increases color temperature from 3800-5500 Kelvin (commonly used with flashbulbs)
80D increases color temperature from 4100-5500 Kelvin (commonly used to remove extreme orange or red)
Type: Color Conversion
Grade: KB15 (80A)
Filter Factor: 2.2 (+1.25 stops) (approx)
Effect: Balances daylight film for use with most standard tungsten lighting, studio lighting and copy stand lighting
Application: Used to shoot daylight film under artificial (household) lighting conditions
Color Temperature: Increases color temperature from 3200-5500 Kelvin
Construction: Schott Glass
Front Filter Thread Size: 67mm
Front Lens Cap Size: 67mm