A Kodak 4 x 12" #47B Deep Blue Wratten Gel Filter for Tricolor/Color Separation Work accentuates haze and fog. Also used in dye transfer printing and for contrast effects (lightens blue tones).
Most Kodak gelatin filters are available in 3 x 3" (75 x 75mm), 4 x 4" (100 x 100mm), 6 x 6" (150 x 150mm), 14 x 18" (350 x 450mm) and 4 x 12" (10.2 x 30.5cm).
| Type | Deep Blue |
| Size | 4 x 12" (10.2 x 30.5cm) |
| Grade | 47B |
| Filter Factor | 8 (+3 stops) |
| Multi-Coated | Not Applicable |
| Rotating | Not Applicable |
| Effect | Lightens blues |
| Application | Nature, scenics |
| Color Temperature | Not Specified by Manufacturer |
| Construction | Gel |
| Front Filter Thread Size | Not Applicable |
| Front Lens Cap Size | Not Applicable |