ICEINSPACE
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Moon Phase
CURRENT MOON
Waxing Crescent 1.9%
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14-12-2007, 06:01 PM
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Narrowfield rules!
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Join Date: Nov 2006
Location: Torquay
Posts: 5,065
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NGC1365 Galaxy
Hi Guys
NGC1365 Galaxy in LRVB (science filters)
100:30:40:50 mins (all 10min subs). L bin1 RVB bin2
http://tinyurl.com/2djc5q
I just cant get good resolution, especially with LRGB, Jase is right, need a bigger cam ;-).
Cheers
Fred
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14-12-2007, 07:04 PM
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Registered User
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Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
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Sir Fred, What are you doing?...using scientific filters for RGB imaging.  You're a brave, bold man. I've tried this but failed. I found it difficult to getting the right balance as the BVR filters have considerable colour cross over. Particularly the V (visible). Actually in retrospect, you haven't done a bad job. The purple tone around the nebula gives it away and looks like the minimum filter on the stars has played some havoc. Still take my hat off to you... but seriously, do us a favour, next time your in SA swap your OIII and SII filters. I think this will open up more targets for you. I recall an offline discussion around filter selection... I suspect you should have gone with the RGB set after all. 
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14-12-2007, 07:15 PM
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Registered User
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Join Date: Feb 2006
Location: Perth, Western Australia
Posts: 4,563
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Gez that's got pretty nice detail in it! right along those arms. I quite like the resulting colour aethetically (I can't comment on scientific filters and all that stuff). 
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14-12-2007, 07:34 PM
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Narrowfield rules!
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Join Date: Nov 2006
Location: Torquay
Posts: 5,065
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oh Jase, you hit the nail on the head, balance was a nightmare. And yes the V was just awefull, magenta to hell, I actually had to use colour replace in PS, eeek, and still there is purple. They have a transmission efficiency of 80% and shocking cross over, not good compared to RGB, and I over used the minimum filter. This has not been a pleasent experience, got the slaming it deserved. You have a point damb it, unless science filters gets a good run, its back to RGB. It appears the science guys use only V 80% of the time, so therl be room for RGB. Your a bright boy Jase, not much gets past you ;-).
Roger. Thanks, but you are too kind, I now think its way to saturated.
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14-12-2007, 07:42 PM
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Narrowfield rules!
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Join Date: Nov 2006
Location: Torquay
Posts: 5,065
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Quote:
Originally Posted by jase
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 punk
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14-12-2007, 09:41 PM
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Registered User
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Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
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Quote:
Originally Posted by Bassnut
This has not been a pleasent experience, got the slaming it deserved.
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You've got to try these things Fred. I'm not going to say its impossible, but performing BVR imaging as a replacement to conventional RGB takes some effort. I went to the extent of also collecting data on a G2V star so I could confirm my colour balance suspicions, but still found it difficult and failed. Hey, and lets face it, elementary filtered RGB can get tricky at times, especially when you've got an individual channel with a gradient that offsets the other two channels. If not corrected carefully, it results in a different colour balance ratio as you've changed pixel values. Those OSC (one shot colour) guys almost have it too easy.
Not sure if you've seen the work of Stephane Guisard. He seems to have mastered the BVRI imaging - http://astrosurf.com/sguisard/
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14-12-2007, 10:21 PM
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I HATE COMA!
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Join Date: Jan 2006
Location: Melbourne, Victoria
Posts: 3,208
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i'll be rapped if i capture that quality. very nice fred. Always enjoy your images.
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14-12-2007, 11:09 PM
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Support your local RFS
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Join Date: May 2006
Location: Wamboin NSW
Posts: 12,405
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That's a very impressive image Fred, I love the detail in the spiral arms.
Cheers
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15-12-2007, 12:49 AM
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The 'DRAGON MAN'
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Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
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Wow, Fred!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!
Regardless of what filters you used, that is a stunning image!!!!!! 
I LOVE IT!!!
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15-12-2007, 01:03 AM
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Registered User
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Join Date: Aug 2005
Location: Hahndorf, South Australia
Posts: 4,373
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Thanks for the image Fred,
The galaxy was so detailed it was like looking over a neighbour's fence!
Lovely!!
Doug
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15-12-2007, 03:03 PM
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Registered User
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Join Date: Feb 2006
Location: Perth, Western Australia
Posts: 4,563
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Quote:
Originally Posted by Bassnut
Roger. Thanks, but you are too kind, I now think its way to saturated.
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I disagree - I really do like the colours and detail of the shot. 70% zoom it's fantastic, if I took it I'd be printing it out for sure.
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15-12-2007, 06:52 PM
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Quietly watching
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Join Date: Jul 2007
Location: Yarra Junction
Posts: 3,044
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youve captured lots of detail there fred, most of us would be delighted to get that much.... still if you feel you can do better who am i to argue, just post it when you do... id like to have a look 
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16-12-2007, 06:54 AM
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Sir Post a Lot!
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Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
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Up close and personal, Fred! A lovely shot of a grand galaxy.
How many slots does your filterwheel have? Just get a ferris wheel and put every combination of filters in there..
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16-12-2007, 09:19 AM
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Registered User
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Join Date: Jan 2005
Location: Newcastle, NSW, Australia
Posts: 4,116
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A lovely big image scale there, lots of detail for sure.
Scott
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16-12-2007, 12:15 PM
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Amongst the stars
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Join Date: Jun 2006
Location: Glen Innes, N.S.W.
Posts: 2,888
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Very nice Fred!
Don`t think you missed to much detail there!
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17-12-2007, 09:51 AM
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Narrowfield rules!
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Join Date: Nov 2006
Location: Torquay
Posts: 5,065
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Thanks for your kind replys guys, much appreciated.
Cheers
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