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TrevorW
04-04-2009, 04:54 PM
Target: NGC3372 Eta Carinae Nebula
Camera: Canon 350d modified Baader 2” Skyglow filter
Exposure Capture: DLSR Focus
Scope: Orion 80 ED
Mount: EQ6 Pro
Exposure Setting: Prime focus, ISO800 ICNR off Daylight WB
Exposures: 10 x 330s total 55m taken 03/04/09 between 8:30pm and 9:30pm
Seeing: Average, waxing gibbous moon 65%
Guiding: Orion Starshoot Autoguider using PHD
Focus: DSLR Focus
Stacking: DSS 10darks, 5flats, no bias applied stacking time 15-20 minutes
Processing: PS CS3, PS7

Info: Situated in the Carina
Carinae Nebula 10h 45m 59.52 bright diffuse nebula surrounding n Carinae easily visible with the naked eye. Discovered by Lacaille 1751-52. This giant diffuse nebula is one of the largest H II regions (composed of ionized hydrogen gas) in our Milky Way (http://www.seds.org/messier/more/mw.html) galaxy. The star forming nebula NGC 3372 has produced the very conspicuous peculiar star Eta Carinae (http://www.seds.org/messier/xtra/ngc/etacar.html), which is among the most massive and luminous stars in our Milky Way (http://www.seds.org/messier/more/mw.html), and perhaps in the universe.
Bassnut
04-04-2009, 05:27 PM
mmm, dont know what to make of this Trevor, core detail is saturated and it seems over curved generally, and loosing depth in the process
TrevorW
04-04-2009, 05:49 PM
Have to agree on the first image (now deleted) was not that happy with it myself, the data's there and I had another go at processing I was trying a Baader Skyglow filter for the first time. The second image is probably a tad red but much better IMO

Fred any helpful suggestions

Thanks
TrevorW
06-04-2009, 07:18 PM
A larger image can be seen at

http://www.pbase.com/trevrw/astro

Cheers
Bassnut
06-04-2009, 08:12 PM
Yes, thats better. The background must have been fairly high I guess given the moon was up, I dont have any experience with a skyglow filter, but it seems to help. Some stars appear a bit fat and saturated for that FL, or is that the filter?. Perhaps some short exposures (for smaller stars) could be selectively blended in in PS.

Other than the big stars, which are pretty distracting, that repro is pretty good.
TrevorW
09-04-2009, 09:06 PM
No idea what's causing the bloated stars anyone got a suggestion.
Bassnut
09-04-2009, 09:15 PM
On reflection Trevor, I dont think its that bad. Id be happy with that. In fact id say you should be proud of it, sorry to cause concern :thumbsup: