This is the "Green" version of Orion nebula (M42) in Ha, SII and OIII bands. About 6 hours of exposure with FLI Proline, Astro-Physics 155 + AP field flatterner. Captured with CCDAutopilot 5 through Maxlm. Guided with Takahashi 60 FS and Starlight Express Super, Paramount MX mount. Processed with PixInsight and PhotoShop CS6. Bias, Dark and Flat frames calibrated. Diffraction spikes are artificial, I like them though.
Taken on the nights of 25 September and 24 October 2013. Backyard observatory, Turramurra, Sydney.
Going to be honest here David, it looks pretty ummm? Yuk
It has the hallmarks of the things one would expect from the great gear used buuuut I think you should have another tinker, love to see what else you might come up with so put it up here when you do
Luckely, you can ignor Mike, as many many do. Granted its crap in some ways, but I like your thinking on his one. All the hallmarks of budding "astro art", bugger the purists, youll get there.
Luckely, you can ignor Mike, as many many do. Granted its crap in some ways, but I like your thinking on his one. All the hallmarks of budding "astro art", bugger the purists, youll get there.
LOL, I happened to discover something in PixInsight called LocalHistrogramTransformation, gave a couple of runs will definitely control my excitement. Thanks for your advice
Quote:
Originally Posted by Bassnut
Overprocessed to hell, but different, nice change to the usual overwhelmingly yet again boring RGB.
LOL too, I watched too much PI on Youtube and tried them all on this image.
Quote:
Originally Posted by strongmanmike
Going to be honest here David, it looks pretty ummm? Yuk
It has the hallmarks of the things one would expect from the great gear used buuuut I think you should have another tinker, love to see what else you might come up with so put it up here when you do
Mike
Thanks Mike, much to learn I am. Thanks for you valuable comments. Will try to process this one again surely.
Quote:
Originally Posted by alpal
I think the raw data stacks of: Ha, SII and OIII, would be excellent.
I'd like to have a go at processing it.
Sure alpha, Please have a go Perhaps write down what are your steps too for us novices to follow!
Its a striking image David. As mentioned the most obvious processing issue is its oversharpened. Sharpening is best done selective with a mask as it can be quite a destructive process.
Loving that data! I ended up doing a sigma reject, with a Catmul-Rom, and then a Sum-Median stack - all CCDStack of course.
Decided against colour (green... no thanks!), went grayscale.
LOTS and LOTS of detail! I had to upload as a jpeg - Astrobin is having an issue with png's at the moment. Hence some image artifact.
Lay off the fake diffraction spikes though David - the beauty of a 155mm AP refractor ruined with fake diffraction spikes I dunno, never like seeing M42 "hanging" - I had to rotate it 180°
No actually, it would make a wonderful bathroom tile or ceramic piece, seriously . So yes, as a monochrome art work it does look quite striking but as an astronomical image...I dunnooo needs more colours and variation I recon
No actually, it would make a wonderful bathroom tile or ceramic piece, seriously . So yes, as a monochrome art work it does look quite striking but as an astronomical image...I dunnooo needs more colours and variation I recon
Agree. As has been mentioned many times before, green does not belong in space I have NO intention of ever using an nitrogen filter personally. M42 looks YAK in green.
I am going to replace colours and see if I can come close to an RGB with it
If you have time alpal, would love to see what others can come up too. Thanks in advance.
David
Hi David,
I got an interesting effect by reprocessing with swapped Hubble palette.
Now Ha = Red, SII = Green & OIII stayed Blue.
It was reprocessed & then added approximately 50% opacity with the
last pic with normal Hubble palette.
It was then rotated & cropped.
A lot of great detail came popping out.
As others have suggested I tried without green and without sharpening it too much , I don't understand why green (Ha) signal is so strong?
Isn't Hydrogen the most common element so makes sense it's more abundant? Have a look at the exposure times that the narrowband gurus like Fred V use. Hours and hours on just SII. Need that to get the signal/noise ratio up so it can be stretched enough to match the Ha.
Yuk 
will definitely control my excitement. Thanks for your advice
