A natural fog causes lights to glow and flare. Contrast is lower, and sharpness may be affected as well. Fog filters mimic the effect of atomized water droplets in the air. These filters can take
The Hoya 58mm R72 Infrared Filter is a specialized filter used for infrared photography with digital cameras and specialized infrared film. This nearly opaque filter blocks all visible light up to 720nm, enabling recording of subject matter and scenes that are not visible under normal conditions....
Used for photography with infrared films.
RM90 passes only that above 900nm.
Often used in crime detection, medical photography, detection of distribution of vegetation, etc
For use when the sun is too bright and the shadows too dark and it is difficult to get good detail in both at the same time.
Formatt Low Contrast Filters reduce contrast by allowing more shadow detail to be visible. Ideal for those who shoot video and desire a film look....