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NGC 2174/5 - 24-01-08 - Atik 16HR - Narrow Band Filters

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This is a practice run at using the Atik with narrow band filters. I hope to do some long exposure work with this setup. The framing is not quite right but decided to carry on rather than restart.

130mm APO at F6 , 35mins - Ha , 35 mins OIII , synthesised green chan.The images were taken with 5 min subs. Next fine night ( will there be one ?) I hope to increase the subs length to about 8 or 10 mins and follow Martin's primer.



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