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Old 22-03-2012, 09:56 PM
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troypiggo (Troy)
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troypiggo is offline
 
Join Date: Nov 2008
Location: Brisbane, Australia
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From what I read on that Astrodon link I gave above, it's because of the high transmission of those filters. For both 3nm and 5nm the transmission is same percentage at the relevant wavelength.
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