Reduces excess blue from flash indoors or in daylight flash-fill.
Warms (balances) sea, sky and high altitude shots.
Adds healthy look to skintones shot in open shade or overcast.
Multi coated for flare prevention.
"81" series are color corrective filters that 'warm' bluish tones. They are avaible in several strengths (A, B, C & EF) with 'A' being the mildest warming effect. Available in all popular sizes.