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57 arc seconds
Baader Hyperion Aspheric Eyepiece - 1
Celestron CPC Deluxe 800 HD Computerized Telescope Specifications
and mirror star diagonal
180 tooth brass gear and
Explore Scientific O-III Nebula Filter - 2" - 310200 IR Filters 57 arc secondsExplore Scientific Oxygen III Nebula Filter Fits 2" Eyepieces Narrowband Nebula Filter Useful for viewing objects that glow in O III light Bandwidth of 483 nm to 511 nm, peak at 496 nm 96. 7% Transmission Fits 2" Eyepieces This is the highest contrast Nebula Filter in the series, a Narrowband line filter for only the two emission lines of oxygen. A great choice for observations of supernova remnants and other nebulae that glow in O III emission light.
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