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  #1  
Old 14-10-2008, 09:10 PM
EddieT (Eddie)
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Sagittarius Trio of Nebula

Hi,
It's been a while since I posted anything, but I've been slowly processing numerous images from the last year.

This is one was taken with Louie A's FS60 which he gratiously loaned me for a few months and my QHY8 camera from my backyard here in Surfers paradise.

4 hours worth of 10 minute exposures taken on the 10th July this year.

http://astroshed.com/miscpics/sagm.jpg

The field covered is 3.8 x 2.5 degrees.

Hope you like it!

Eddie
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  #2  
Old 14-10-2008, 09:23 PM
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Jeffkop (Jeff)
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That is a great image Eddie, another truly unique take on a reasonably well photographed area. Looks in all aspects astrophotographic wise ... Excellent
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  #3  
Old 14-10-2008, 09:36 PM
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Octane (Humayun)
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Eddie,

Remarkable image. Beautifully processed, too; the detail in the nebula to the left of M8 is exquisite.

I'm not sure if you're familiar with DSLRs, but, would you say that the QHY8 operates similarly to a DSLR set to ISO-100?

Where is Louie nowadays? I have not heard from him since last year.

Regards,
Humayun
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  #4  
Old 14-10-2008, 09:43 PM
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Very nice to my eyes ...cheers Kev.
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Old 14-10-2008, 10:10 PM
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seeker372011 (Narayan)
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the dark lanes are the highlight of a remarkable image..
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Old 14-10-2008, 10:34 PM
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Fabulous image Eddie.

Greg.
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  #7  
Old 15-10-2008, 12:26 AM
Hagar (Doug)
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Wonderful image Eddie, what a magnificent field of view with that little scope. How on earth do you focus with such small targets in such a wide field?

Beautiful image.
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  #8  
Old 15-10-2008, 04:34 AM
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iceman (Mike)
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Stunning image, Eddie! Great to see you back again. I look forward to more.
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  #9  
Old 15-10-2008, 07:26 AM
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That is a standout image, with such contrast from dark lanes to coloured nebula.

Well done Eddie.
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  #10  
Old 15-10-2008, 07:35 AM
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Lovely!!
Wish I could do that.
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  #11  
Old 15-10-2008, 08:30 AM
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Nice result and well framed!
Good job Eddie!
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  #12  
Old 15-10-2008, 08:37 AM
EddieT (Eddie)
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Many thanks to you all for your very nice comments!

Some answers...

Octane: Sorry but I have absolutely no experience with DSLRs, so can't say what the relationship is between a DSLR ISO setting and an OSC camera. If Gain is similar, I set mine to 50.

Louie is still around though very busy I think these days.

Hagar: I focus by the numbers. Usually with a Robofocus, but because the FS-60 wasn't mine and I only had it for a little while, I didn't get to mount an RF motor on it, so had to focus manually. But still by the numbers.

I do a rough focus in highly binned mode (4x4 with the QHY8), using very fast exposures, say 1 second and turn the focus knob slowly, just watching the stars in the resulting image on-screen. When it's close to being focused, I'll sub-frame the brightest star into a very small frame, switch to 1x1 binning (unbinned) and take as fast images as the possible, 1 second or faster, then tweak the focus knob while watching the numbers on screen until the focus sharpeness is maxed (in CCDSoft) or the FWHM is minimised (in Maxim DL). This usually gets it very accurate.

Of course I went to bed after it started taking images (and checking the cloud patterns), so from then it was up to the little scope to not shift focus for the rest of the night, which it didn't, to its credit!

Many thanks again for all your gratious comments
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  #13  
Old 15-10-2008, 09:38 AM
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Wonderful image Eddie which gives me a new perspective on this area. Did you use a flattener/reducer on the Tak? Craig
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  #14  
Old 15-10-2008, 09:59 AM
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glenc (Glen)
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Wow, thanks Eddie.
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  #15  
Old 15-10-2008, 10:11 AM
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RB (Andrew)
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Beautiful image Eddie and nice to see your work again.

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  #16  
Old 15-10-2008, 04:51 PM
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A beautiful and unique perspective on this region. Love the dark areas. Well done!
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  #17  
Old 15-10-2008, 06:22 PM
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strongmanmike (Michael)
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You have opted for some strong contrast in this image but a very nice job, that region is always nice to look at, you should visit here more often mate!

Sigh...I miss your close-up Keyhole.....



Mike
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  #18  
Old 15-10-2008, 07:08 PM
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suma126 (Shane)
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Very Very Nice Just Show,s How Many Stars Are Up There.
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  #19  
Old 15-10-2008, 07:16 PM
EddieT (Eddie)
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Thanks people!
Craig, yes Louie sent up the FS-60 flattener as well. If I remember rightly it increased the focal length very slightly...I didn't measure the scale difference accurately, and I don't think I had it exactly the correct distance. Without the flattener the corners were quite terrible, but with it made the world of difference!

Mike! How is it mate!....Ha my long focal-length days are behind me I think. I can't afford equipment to take me to the next level, so I've opted for more wide-field. I have a Tak e180 on the way and am doing some experimenting with medium format lenses.....so its wide field for me!
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  #20  
Old 15-10-2008, 07:17 PM
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stunning shot love it.
Phil
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