This valuable accessory to the Trijicon Reflex Sight improves the aiming dot contrast when used with a flashlight,
In varying lighting conditions, or when aiming at a light source. Light transmission though the filter can be adjusted by rotating the outer ring of the filter. The full range of filtration density from lightest to darkest is reached in just a 90 degree turn.
Transmission = 78%
Light Lost = 22%
Transmission = 1%
Light Lost = 99%