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Author Topic: m33 left side of image bright  (Read 254 times)

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Offline clive

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m33 left side of image bright
« on: 23:04:22, 17 November, 2017 »
i imaged m33 last night it was off center i did 12 5 minute  exposures luminence filter  red green blue never came out because i did only 5  minute subs  so i read they got to be three times longer exposure left side of the image is quite bright i would like to know what caused it  i did flats bias darks i had problems doing flats ha just me next time ill do 15 minute exposures for red green  blue  cheers boys

Offline chris.bailey

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Re: m33 left side of image bright
« Reply #1 on: 08:09:35, 18 November, 2017 »

Who told you 15 minutes for RGB. It all depends on your sky conditions though 5 minutes is a bit short. I tend to shoot 8 minute RGB.

Quite a gradient on that, easily dealt with. Is it present in the same place on all subs. Outside light?

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Offline clive

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Re: m33 left side of image bright
« Reply #2 on: 12:06:01, 18 November, 2017 »
Just checked the luminence subs 11 of am in dss could not see light on the left side of subs only shows up after stacking red green blue the signal was to low on them subs   ill do 8 minute subs next time i read on net about 3 times longer subs red green blue  dont think my flats worked i did have problems i had to restart my lap top sg pro stoped working hopfuly next time ill do my flats right i was thinking my ccd camera  was falty cheers


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