The Kodak 4 x 12" #38A Blue Special Color Effect Wratten Gel Filter is useful for correcting the tendency of reds to reproduce too lightly under tungsten illumination; when used for portraiture, skin tones are more natural and modeling is improved.
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 30.5mm)
| Type | Blue |
| Size | 4 x 12" (10.2 x 30.5cm) |
| Grade | 38A |
| Filter Factor | 1.5 (+2/3 stops) |
| Multi-Coated | Not Applicable |
| Rotating | Not Applicable |
| Effect | Corrects the tendency of reds to reproduce too lightly under tungsten illumination |
| Application | Portraiture |
| Color Temperature | Not Applicable |
| Construction | Gelatin |
| Front Filter Thread Size | Not Applicable |
| Front Lens Cap Size | Not Applicable |