Heliopan 39mm 81B Warming Filter -
"81" series are color corrective filters that 'warm' bluish tones. They are available in several strengths (A, B, C & EF) with 'A' being the mildest warming effect.
- Reduces excess blue from flash indoors or in daylight flash-fill.
- Warms (balances) sea, sky and high altitude shots.
- Adds healthy tone to skin tones shot in open shade or overcast.