Heliopan 52mm KR 3 (81C) 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. Adds healthy tone to skin tones shot in open shade or overcast. Reduces excess blue from f
Heliopan 58mm Digital UV and IR Blocking Glass Filter. Heliopan Digital Filter.... This filter has been especially designed for imaging with digital sensors. Since they have a significantly higher sensitivity in the IR area then film material, it blocks both disturbing UV and IR light. The result is improved
