About this item:
- Creates warmer tones and brighter colors on overcast days or when shooting with an electronic flash
- Great for improving flesh tones
- 77mm diameter
- 81A converts tungsten 3,200 K type B film to 3,400 K lighting
This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings.