Used to decrease the colour temperature slightly for a warmer (redder) tone
Corrects the tendency toward bluish tones
Renowned for their ability to minimise reflection at the filter surfaces which reduces flare and ghosting
"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.