Nebula Filter Oxygen III 1.25-inch Skill Level_Intermediate and a red dot finder

and a red dot finder for easy navigation

The Explore Scientific AR102 Air-Spaced Doublet Refractor delivers stunning

it’s an excellent choice for backyard observing or trips to darker skies

this classic STEM set helps kids build skills in observation

Nebula Filter Oxygen III 1.25-inch Skill Level_Intermediate and a red dot finderExplore Scientific Nebula Filter 1. 25" O III Range from 483nm to 511nm with peak at 496nm. Transmission 96. 7% Oxygen III This is the highest contrast Nebula Filter in the series, a line filter for only the two emission lines of oxygen. A great choice for observations of supernova remnants and other nebulae that glow in OIII. Other types of objects that glow in all parts of the visible spectrum (e. g. galaxies) are reduced visibly, but some normally