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Old 25-08-2014, 08:47 PM
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Camelopardalis (Dunk)
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Orion's swinging cod

Well folks, while this is the first time capturing Orion's fish mouth for me, I don't expect it will be the last this season

Ed and I braved the moody sky at Mt Blackheath last night and after some experimentation managed to eek a few 1 minute subs out of the rig before the Sun came up

Canon 1100D unmodded attached to C8 Edge HD + 0.7x reducer unguided on an EQ6.

This is a combination of 5 subs at ISO100, 8 subs at ISO 400 and 3 subs at ISO1600...25 were taken in all but I had to chuck the rest because of star trails I need to sort my guiding out! Also a first for me, it features not only lights, darks and biases, but also flats collected at source

The outer layer in particular is quite noisy, coming from only 3 subs and seeing an aggressive curve so I'll look forward to getting some more subs to improve this later. I could probably use a little wider field but I don't have an in-between scope just yet.

This is my first concoction with funky layers, and as always, suggestions as to how to handle them or anything else welcomed! Maybe I haven't stretched the ISO400 layer enough
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Old 25-08-2014, 10:50 PM
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cometcatcher (Kevin)
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It looks to be in reasonable proportion, other than the core being a bit desaturated.

I'm shooting M42 in dribs and drabs at the moment. Might have something to show for it in 6 months time...
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Old 25-08-2014, 11:16 PM
PeterEde (Peter)
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I like
enticing. Hmmm to awaken at 4am again for Orion or wait till summer months when I can get it at a reasonable hour?
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Old 26-08-2014, 12:14 AM
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SimmoW (SIMON)
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I like! Can't wait to image her soon. How long were your subs? maybe try a few at 10 secs just for the core?
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Old 26-08-2014, 10:35 AM
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Camelopardalis (Dunk)
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Thanks chaps! I look forward to getting more subs sometime, hopefully this rain will eventually let us be...

Quote:
Originally Posted by cometcatcher View Post
It looks to be in reasonable proportion, other than the core being a bit desaturated.

I'm shooting M42 in dribs and drabs at the moment. Might have something to show for it in 6 months time...
OK thanks - I'll take a look at the core - it's mostly white in my subs though

Quote:
Originally Posted by PeterEde View Post
I like
enticing. Hmmm to awaken at 4am again for Orion or wait till summer months when I can get it at a reasonable hour?
well I'd travelled for 2 hours out of the city and the clouds just teased us until about midnight, so I wasn't giving up easily had a beautiful sunrise too.

Quote:
Originally Posted by SimmoW View Post
I like! Can't wait to image her soon. How long were your subs? maybe try a few at 10 secs just for the core?
The subs were 1 minute long. Will definitely try much shorter subs next time, and lots of them too. The total was 16 minutes of lights, and obviously I need more especially around the fainter outer regions, but I was pretty floored when I saw the first ISO1600 sub on the camera screen
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Old 26-08-2014, 02:03 PM
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Quote:
Originally Posted by Camelopardalis View Post
OK thanks - I'll take a look at the core - it's mostly white in my subs though
Mmm. Shouldn't be.
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Old 26-08-2014, 05:25 PM
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killswitch (Edison)
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Looks amazing Dunk! Well worth the early morning wait.

Ill definitely give it a go with my C8 next time we head up.
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Old 26-08-2014, 05:53 PM
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Nice job Dunk; strange about the white subs though, with an unmodded
camera and short 10-20 sec subs, the core should be a bright green/blue
if looked at through the viewfinder, as in the attached sub.
15 secs @ ISO400. Straight from the camera.
raymo
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Old 26-08-2014, 09:48 PM
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Nice one Dunk. More data will help with that noise, but still a good effort mate.
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Old 26-08-2014, 10:29 PM
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Camelopardalis (Dunk)
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Thanks chaps! Ed, worth a go, although need more time

Definitely not purple, and only a touch of green if I dial the saturation all the way up
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Old 27-08-2014, 11:12 AM
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OK, so I've gone back to look at the raw files...looks like it either dissipated in the stacking or I've lost it when stretching out the reds, as there's a green hue in the core at each ISO
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  #12  
Old 27-08-2014, 12:49 PM
raymo
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Interesting that at the same ISO, and with the same model camera, your image shows a paler green. Mine is a JPEG; if yours is CR2, maybe there
is some difference in the outut of the two file types.
raymo
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Old 27-08-2014, 01:17 PM
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Camelopardalis (Dunk)
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Yeah I have to wonder what processing the camera is doing to get the jpeg...my personal preference is to use raws instead and then at least I have more control over the data going forwards...constantly learning and maybe someday when I'm have a little competency I might go back and revisit some old data! But most of it is crap tbh as I'm also trying to learn my aligning and setup techniques too
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Old 27-08-2014, 09:09 PM
raymo
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My old brain is tired of converting files so that various software can use
them. I'm quite happy to accept that raw is better, but I just take the easy route, just the same as I don't use separate darks, I'm happy to let the camera do it's thing by enabling the two noise reduction features.
TIFF, FITS, Raw, JPEG, Mov, AVI, GIF, Cr2, 8 bit, 16 bit, 32 bit, NOOOO
OOOOOOOOOOOOOOOO. Someone here got peeed off a while back
because I kept on about my lack of comp literacy. I truly cannot send
a text message, don't have a mobile. Let an old bloke say his bit,and
I promise to not do it again. There, I feel much better now.
raymo

P.S. You all may not have to put up with me for much longer anyway. If I don't get a useable night
soon, I might end up throwing my scope at the wall.[ That's if I could lift it.]

Last edited by raymo; 27-08-2014 at 09:49 PM. Reason: more text again
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  #15  
Old 27-08-2014, 09:25 PM
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Camelopardalis (Dunk)
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proof is in the pudding raymo, keep the pics coming is what I say
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  #16  
Old 27-08-2014, 09:51 PM
raymo
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I'll do my best.
raymo
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