Technical - Tricolour - No 47B Tricolour Blue
A Separation filter with maximum transmission at 440 nanometres. Approx exposure increase 2½ to 3 stops.
Type Polyester
| LEE BK75 NO 47B | No 47B Tricolour Blue 75mm x 75mm Polyester Camera Filter |
| LEE BK100 NO 47B | No 47B Tricolour Blue 100mm x 100mm Polyester Camera Filter |