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ICX618 is red-oriented as those webcam-ish CCDs are green-oriented to mimic human eye sensitivity and color balance, so you get massive sensitivity boost at red and IR. Look at the attachment - it's even better than ICX285 from cams like Atik314, DSI III Pro (relativity taken from the max sensitivity in mV per square pixel micron numbers). ICX424AL from Dragonfly 2 (and others) would be slightly better than ICX098.
I'm thinking about convincing my local astroshop to do a test of Baader methane filter when I get the Basler Ace.
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