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Featuring true diffraction-limited optics with a wide-field f/6
due to the over-sized knurled knobs that are attached to the end of each cable
The play structure has both a split flap main entrance and a circular flap opening for crawl-through fun
a smartphone adapter
Nebula Filter Oxygen III 1.25-inch eclipse Featuring true diffraction-limited optics withExplore 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
US$ 79.00
US$ 79.00
US$ 65.00
US$ 65.00
