Quote:
Originally Posted by renormalised
Nice piccie there, Greg 
You probably don't need to go any deeper than what you have there, unless you want to shoot the galaxies individually. |
I think you are right. Its a broad view image rather than a closeup detailed view of a galaxy.
Quote:
Originally Posted by Stevec35
Yeah I think you got it pretty right with that exposure Greg. Nice little group that I haven't seen before.
Cheers
Steve
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Thanks Steve. That spiral is pretty.
Quote:
Originally Posted by Larryp
Nice work, Greg
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Cheers Larry.
Quote:
Originally Posted by rogerg
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Yes I am surprised as well. Part of it was careful callibration of the data, part the processing but mostly the 17 inch aperture and whilst at my home observatory I don't have super dark skies they are reasonably dark especially from the zenith to the west. I think this was imaged to the west and gave better data than normal. A lot of the galaxies at the moment are rising in the east around Acemar.
Quote:
Originally Posted by renormalised
Roger, your SNR might be being impacted by a number of things. Site location, seeing that night etc etc. Might need to adjust the cooling on your camera. You may even have tube currents or air in the tube that's slightly hotter than the surrounds...may need to vent your tube. Who knows...a bit of experimenting might help.
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Depending on your light pollution 3 minutes is probaby a bit short unless you are going short for other reasons like tracking. The object you chose may be dimmer. The camera has to get above the read noise to show an image so too short and some of the faint stuff will not get above the noise.
On the other hand 10 minutes at 2.5+ metres requires some pretty accurate tracking so that would be tough as well.
Your exposure strategy should work fine on the brighter galaxies though.
Greg.