Amazing Sky by Alan Dyer

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Four Star Spectra Compared.jpg

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The spectra of four stars compared.

Taken with a 135mm lens and the RSpec Star Analyzer 100 grating spectragraph placed in front of the lens. 20s at f/4 and ISO 400, on the Star Adventurer tracker.
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© 2019 Alan Dyer
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The spectra of four stars compared. <br /> <br /> Taken with a 135mm lens and the RSpec Star Analyzer 100 grating spectragraph placed in front of the lens. 20s at f/4 and ISO 400, on the Star Adventurer tracker.