This ND96 neutral density filter allows 50 percent of the visible light to pass through
It can be screwed on to virtually any astronomy eyepiece or accessory that has 1.25 inch filter threads
Features a standard 1.25 inch female filter thread on the other side; so it can be stacked with additional filters
A Classic: This is a premium eyepiece that provides better images than the eyepieces that come with new telescopes; The ingenious design uses only 5 lenses; yet provides a clear and bright image; making it an indispensable eyepiece for astronomers
52 Degree FOV: This 4mm 12.5mm eyepiece has a wider field of view of 52 degrees (46 degree for the 40mm) than most eyepieces allowing you to see more detail; you can choose a combination of eyepieces with the right focal length for your telescope
Description
Neutral density filters are excellent filters to reduce the overall brightness of an image to cut down glare while viewing bright astronomical objects through a telescope. They are useful for splitting binary systems, comfortably observing the moon, or stacking with other planetary filters. ND filters retain true color balance of the objects being observed since all wavelengths are transmitted uniformly over the entire spectrum.