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Old 27-04-2010, 05:37 PM
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Bassnut (Fred)
Narrowfield rules!

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Join Date: Nov 2006
Location: Torquay
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OK, cool. I have found SII is always a pain on a CCD too, it nearly always requires double the exposure of the other filters, sometimes much more than double, I think its just thats theres less SII out there.

SII seems to be within the response of OSCs red curve, so I dont think its a QE issue so much.
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