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this classic STEM set helps kids build skills in observation
The fully coated BK-7 optics and solid mechanics enable a true color picture replication
and nebulae into sharp view
The Explore Scientific AR102 Air-Spaced Doublet Refractor delivers stunning
Nebula Filter Oxygen III 1.25-inch Skill Level_Intermediate this classic STEM set helpsExplore 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
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