Neutral Density Filter 2" ND 0.9 10x42 observations of active regions of

observations of active regions of the sun

high-quality 90mm air-spaced doublet lens

Its compact Maksutov-Cassegrain design combines portability with performance

making them ideal for both visual observing and astrophotography

Engineer your own V8 combustion engine

Neutral Density Filter 2" ND 0.9 10x42 observations of active regions ofThe neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradiation when observing the Moon with any telescope 4"(10. 2cm) and larger. The ND96 filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness. Color Filter #ND96 Moon Filter (0. 9 density; 13% transmission)