Neutral Density Filter 1.25" ND 0.9 Hybrid Explore the night sky with

Explore the night sky with confidence using the National Geographic 70mm Refractor Telescope — a beginner-friendly telescope with impressive optical power and smart features for both visual observation and smartphone photography

especially that of artificial lighting such as mercury vapor lamps

This 10:1 ratio means that you would have to rotate the micro-focusing knob ten times to get the same focus movement with just one rotation of the larger knob

portability

For serious deep-sky exploration at an unbeatable value

Neutral Density Filter 1.25" ND 0.9 Hybrid Explore the night sky withThe 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)