Jase,
As soon as I get a spare chance (and get back to Canberra) I will do as you've recommended and have a look at what's going on. I have noticed the band of red in the bottom before, and I'm just wondering whether it is bodgy dark frame subtraction (I doubt it, though, IRIS is awesome) or a result of me pushing the curves too much.
Thanks, once again. Your advice is most appreciated.
Quote:
Originally Posted by jase
Nah, thought I'd let you off the hook this time.  . Seriously it is a great image. Though I would like to make one comment. This image is a good example of the PS equalize function I mentioned on your M8 post. Try it on this image and let me know what you see. You'll find you have a band of red that evenly runs across the bottom of your image. I'm not entirely sure whats the cause of this as I'm not familiar with your set up. This simply results in your background not being neutral as you'd expect. There are also large patches up the left corner of the frame, but this could purely be the nebulosity from IC4628 as its quite a large emission nebula. The red band across the bottom looks too even/straight to be natural. I'm going to be honest, sometimes I just ignore the background colour shifts. Its depends on how it affects the final image presentation. If you're keen - chase them with selection tools and curves. In this particular case, I'd probably wouldn't address it, but with wide field images it can have a larger impact. Great image none the less.  |
Ric,
Cheers, mate.
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Originally Posted by Ric
A wonderful image Humayun, a lovely well defined cluster.
Great effort
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Nick,
Thanks, once again.
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Originally Posted by Dr Nick
Nice pic! |
Regards,
Humayun