The Deep Sky filter, Hydrogen-Beta filter, Oxygen III filter, and Ultra High Contrast Filters are the result of 20 years of steady design improvements, and continue to deliver the highest performance of all anti-light pollution filters obtainable today.

Lumicon Multiple Filter Selectors allow you to switch back and forth between filters without having to thread and unthread them from your eyepieces or diagonal. The nosepiece also has threads, so one filter, such as a neutral density filter or polarizing filter, can be "stacked" with the others. Leaving one of the slots open lets you compare views with and without your Lumicon filters. Made from solid aircraft aluminum.