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4x5.65 (PSR PV)  81EFN3
Light Balancing Filters
81 Series
The 81 series filters are useful with daylight corrected film in cool light conditions. As letters advance, density and warmth increases.
81A, 81B, 81C, & 81EF
  • Creates warmer tones and brighter colors on overcast days or when shooting with electronic flash
  • Great for improving flesh tones
  • 81A converts tungsten 3200 K film to 3400 K lighting
Exposure increase
3,400 to 3,200 K
1/3 stop
3,500 to 3,200 K
1/3 stop
3,600 to 3,850 K
1/3 stop
3,850 to 4,140 K
2/3 stop