Fours filters of increasing intensity, primarily used for introducing warmth into both landscapes and portraits.
|
Filter
|
Conversion
|
Approx Exposure
Increase
|
Mired
Shift
|
| 81 |
3300K to 3200K
|
1/3 Stop
|
+9 |
| 81B |
3500K to 3200K
|
1/3 Stop
|
+27 |
| 81D |
3700K to 3200K
|
2/3 Stop
|
+42 |
| 85C |
5500K to 3800K
|
2/3 Stop
|
+81 |