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Kal
12-05-2007, 01:30 AM
I borrowed a friends colour filters to try on my DSI pro - with mixed results. Taking and processing the seperate monochrome channels I knew what to do, but I'm pretty clueless on how to combine the 3 mono pictures into a single colour pic :shrug:

Google search pointed me to Maxim DL but it costs half a grand $US......there has to be something out there free that I can use if some good samaritan will point me to :D

Anyway, here is the pic. Not the best effort but an educational experience nonetheless.

tornado33
12-05-2007, 01:32 AM
Nothing wrong with that one, the colours look great, thats the correct colour for that nebula :)
Scott

Kal
12-05-2007, 01:36 AM
Maybe I should add that the process I took seemed to take about 68 confusing steps to do the one simple task :P I'm sure I was doing it all wrong.....I had to split my 3 mono pictures into 3 colour channels each (9 images) just so I could select one of each to combine :doh: :whistle:

Ric
12-05-2007, 02:36 AM
Hi Kal, that's a very nice image. You have captured it nicely.
Maxim also offers a 30 day free trial but it's the full version so the download is about 26Mb.

Cheers

Garyh
12-05-2007, 09:18 AM
Hey!, that looks really good to me!!! Be very hard to improve on..

RB
12-05-2007, 10:48 AM
Wow very nice, that's very impressive Andrew !

:thumbsup:

Kal
12-05-2007, 11:08 AM
Thanks for the support guys. It was actually the trial version of maxim DL that I used to combine the pics. Maybe I did something wrong when capturing (saving the mono pictures as a 24 bit color image?) which made post processing more difficult to comprehend. Meade autostarsuite has a function to combine R G and B into a single color pic but I couldn't get it to work - I think it may have been because I stacked the images first in deepskystacker and then the meade software wouldn't recognise the file format that I had saved it as causing the loaded files to look corrupt. I will play around with it more today and see if I can improve on what I have.

Here are a couple of other mono pictures that I took last night as well. In the NGC 2438 image you can just see the central mag 17.5 star. The second pic is the popular 47Tucanae.

Dr Nick
12-05-2007, 02:05 PM
Exellent! ;)
Do you have photoshop?
If so, follow this tutorial (http://www.nicksastronomy.com/rgb.php) I made to guide you through the process of stacking the colour layers.

atalas
12-05-2007, 05:21 PM
Very nice detail!

netwolf
13-05-2007, 12:04 AM
Andrew, you know thats my most favourite target. I just have had a hint of it visually. Will need to take the dob out one night and take a squiz at it. You have done very well geting the details there. Try Stellar Magic there is freeware version of it. Image Plus or AstroArt are the cheaper alternatives to Maxim.

Regards

Kal
13-05-2007, 10:46 AM
Nick - I have photoshop but using layers does my brain in! :P I think I need to really sit down and use a proper tutorial because by the looks of it I could most definately do what I need to do in photoshop - rotating each of the 3 images (removing field rotation) and combining the 3 images. Sometimes I feel like a complete novice while using photoshop :ashamed:

Fahim - thanks for the alternate software suggestions. I downloaded and tried stellar magic, at the price of *free* it is in my price range :P It does the RGB stack and align very well, however it doesn't remove field rotation so I would have to figure out how to do that manually if I use that software.

I think my best bet is getting to know layers in photoshop in depth, I just need to invest some time in learning it all!