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M35 from the early hours of 21.1.09

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Author Topic: M35 from the early hours of 21.1.09  (Read 470 times)
urbanastro
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« on: January 22, 2009, 08:23:15 am »

After imaging comet Kushida, I tried M35 in Gemini in the early hours of 21.1.09. This is taken with a Tak 180 Astrograph at f2.8 and Canon 40D (2x5min subs and 6x3min subs). Itís a great combination of clusters for imaging due to the contrasting star colours:

http://www.smugmug.com/gallery/6401672_oJTsN#458875789_5S2ne-A-LB

regards

malcolm
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jgs001
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« Reply #1 on: January 22, 2009, 08:47:28 am »

Malcolm, that's a lovely image. Much more refined than the one I did a few nights ago.
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John
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urbanastro
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« Reply #2 on: January 22, 2009, 09:23:10 am »

This image is the first time Iíve taken 5 minute sub exposures with the Canon 40D (only done it up till now with ccd cameras), though most of the subs were 3mins. I autoguided this capture via a separate SBIG camera on a side-by-side mounted 90mm refractor and the 5min subs really paid off with much greater depth of detail. I recently acquired PHD guiding software and itís really made my imaging a lot easier and more accurate, allowing subs on the ccd cameras up to 15-20 minutes each. The star colours are brought out even more with the Noels Actions plugin for Photoshop.

Malcolm
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jgs001
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« Reply #3 on: January 22, 2009, 09:32:49 am »

Thanks for all the detail Malcolm.
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John
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brianb
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« Reply #4 on: January 22, 2009, 10:15:55 am »

Really nice image. Just out interest, how much saturation boost are you applying? The reason I ask is that when stacking images in DSS I find that the star colours are usually very muted - perhaps even more so than they appear visually. I usually apply a saturation boost of 20 in post processing in DSS, 35 brings out the green of cometary comae more.
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urbanastro
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« Reply #5 on: January 22, 2009, 12:39:04 pm »

I rarely boost saturation in photoshop Brian, the colour all came from Noels Actions increase star colour although star colours were obvious on the original 16bit tiffs.

Malcolm
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Paul
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« Reply #6 on: January 22, 2009, 01:41:04 pm »

A lovely shot Malcolm, especially through Wimbledon's orange sky! Good to see NGC2158 there too, as you say, an excellent contrast in colour and size to M35.

Brian, I tend use about 30% saturation boost in DSS as the default settings result in an almost monochrome image.
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martinastro
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« Reply #7 on: January 22, 2009, 04:31:25 pm »

Lovely image Malcom!!. Great detail, resolution, and colours.

M35 and its companion are two objects I always observe with the scope. The ghostly glow of NGC2158 in contrast to the rich cluster makes an awesome sight, and image. NGC2158 has been reported as a new comet many times and coming second only to NGC 404 in Andromeda which has fooled even experienced observers...a useless piece of trivia  Smiley
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Roman White
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« Reply #8 on: January 22, 2009, 05:39:49 pm »

Great image, Malcolm. I like the colours too.  Smiley

NGC2158 has been reported as a new comet many times
Grin
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urbanastro
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« Reply #9 on: January 22, 2009, 06:46:55 pm »

Thanks all Wink
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