4 x 5.650" Cool Day for Night Filter enhancing Letter Box Diopters are considered

Letter Box Diopters are considered the reverse of the Strip Diopters

The filter is densest at the edge and tapers to clear by the middle

This filter works by diffusing the light entering the lens with small aberrations

A graduated sunset and a graduated twilight filter are provided as well

4 x 5.650" Cool Day for Night Filter enhancing Letter Box Diopters are consideredThe Tiffen Cool Day for Night Filter is a daytime color effect filter that is designed to simulate the appearance of having photographed or filmed under moonlight. This filter utilizes a blue color to create its effect, based on the perception that moonlight is cool in contrast to daylight. To further enhance the realism of its results, this Cool Day for Night Filter also lowers contrast in order to diminish the appearance of fine details that would