Paramount
26-07-2011, 03:27 AM
Hi
As the moon wasn't rising till late and it was in crescent phase I thought I would have a go at some RGB imaging and I decided on the Cocoon nebula which I have had a couple of goes at in the past. I shot the red data on Saturday and got 4 hours in 10 minute sub frames and just over 4 hours for blue last night again with 10 minute subs. With the light pollution where I live this really was pushing it to the limit but I thiunk the results were worth it. I decded to experiment a bit so I created a synthetic green channel from the red and blue data, this was also partly due to the chance of the weather not playing ball for the next few nights.
After creating the synthetic green channel I followed my usual processing work flow of a couple of iterations of levels followed by several contrast 'S' curves, during this process I "inverse selected" the bright stars so they wouldn't become to bloated and dominant. I then did some colour balancing using Selective colour and a couple of iterations of shadows/highlights to help bring out some of the dust and urrounding nebula. I will still try and get some green data later this week but I was quite pleased with the result so far. This was taken with the FSQ106ED and Starlight Xpress SXVF H9 on a Paramount ME. Just to give an idea of the light pollution where I live, my house is surrounded by other houses and streets on all sides, all my neighbours have bedroom lights which for some reason seem to be on all night, two of the neighbours have security lights which come on frequently during the night. There is an outdoor tennis court a couple of hundred yards down the road with flood lights that stay on till past midnight. There is also a street light 30 yards away that shines into my garden. Please don't get me wrong, I'm not trying to make excuses but I think it is possible to do RGB imaging from light polluted sites if you are prepared to work around it, hopefully this image will reinforce that.
Earlier attempts at this subject can be seen in the image gallery of my website http://www.imagingtheheavens.co.uk
There is also a full size version at the following link http://www.pbase.com/image/136697987/original
Thanks for looking
Best wishes
Gordon
As the moon wasn't rising till late and it was in crescent phase I thought I would have a go at some RGB imaging and I decided on the Cocoon nebula which I have had a couple of goes at in the past. I shot the red data on Saturday and got 4 hours in 10 minute sub frames and just over 4 hours for blue last night again with 10 minute subs. With the light pollution where I live this really was pushing it to the limit but I thiunk the results were worth it. I decded to experiment a bit so I created a synthetic green channel from the red and blue data, this was also partly due to the chance of the weather not playing ball for the next few nights.
After creating the synthetic green channel I followed my usual processing work flow of a couple of iterations of levels followed by several contrast 'S' curves, during this process I "inverse selected" the bright stars so they wouldn't become to bloated and dominant. I then did some colour balancing using Selective colour and a couple of iterations of shadows/highlights to help bring out some of the dust and urrounding nebula. I will still try and get some green data later this week but I was quite pleased with the result so far. This was taken with the FSQ106ED and Starlight Xpress SXVF H9 on a Paramount ME. Just to give an idea of the light pollution where I live, my house is surrounded by other houses and streets on all sides, all my neighbours have bedroom lights which for some reason seem to be on all night, two of the neighbours have security lights which come on frequently during the night. There is an outdoor tennis court a couple of hundred yards down the road with flood lights that stay on till past midnight. There is also a street light 30 yards away that shines into my garden. Please don't get me wrong, I'm not trying to make excuses but I think it is possible to do RGB imaging from light polluted sites if you are prepared to work around it, hopefully this image will reinforce that.
Earlier attempts at this subject can be seen in the image gallery of my website http://www.imagingtheheavens.co.uk
There is also a full size version at the following link http://www.pbase.com/image/136697987/original
Thanks for looking
Best wishes
Gordon