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Nebulae  »  John Goode  »  NGC-7293
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NGC-7293

Object name / Catalog Number: NGC-7293
Camera (specific model): DSI-Pro for L, DSI-c for RGB
Number of Exposures & Exposure length: 56x20 sec for L, 48x20 sec for RGB
Scope: Model, Aperture and F ratio: Meade LX200GPS, alt-az mount, 8” + f/3.3 focal reducer
Filters used: Astronomik IR on both cameras

Additional Information
Guide camera/scope: None
Image Capture Software: Envisage
Processing software:  Envisage drizzle 2x, PhotoShop CS
Other:

Original Photo
 

Photo Comments

ChuckR54 wrote:
Qualified - 4 points

1) Focus/Sharpness - Excellent!
2) Composition - Sometimes I like things off-center, with this object I think centered is better.
3) Star Quality - Good
4) Processing Skills - The green channel is clipped at the bottom crelative to the Red & Blue. I know you probably did this to keep the green from overwhelming the image. In this case, a better approach would be to lower the green channel's intesity overall by adjusting the gamma (midpoint) selectively on the green channel to reduce the overall size of the histogram. Or you could try the channel mixer tool to reduce green. The black point is set a little high...but you know this :-). The image appears a little over-smoothed to my eye.... I think a little less saturation on this image would be better, but these are of course subjective :-)
5) Exposure/Depth - Very good
6) Technical Bonus - Yes - this is a difficult target under any circumstances, doubly so to fit the entire object on this chip & retain the star quality you got.

3:44 PM on January 26, 2008

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