B+W 46mm Blue KB12

The deep blue KB 12 blocks so much red, orange and yellow that it increases the colour temperature of very bright halogen and special photoflood lamps (around 3400 K) to that of daylight. With that kind of illumination, and with daylight colour reversal film, subjects will be reproduced in their original colours. With weaker halogen bulbs or stronger incandescent bulbs in conjunction with this filter and with daylight reversal film, a residue of “warmth” is retained for an optimal mood in interior photographs. Filter factor is 2.0.