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Old 17-03-2010, 07:49 AM
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SkyViking (Rolf)
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Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
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Quote:
Originally Posted by lhansen View Post
Thats an astonishing image - well done
Thanks Lars

Quote:
Originally Posted by CoolhandJo View Post
Very nice indeed . Would be interested to know at what focul length you captured this image?
Quote:
Originally Posted by seeker372011 View Post
Rolf for a modded webcam , that is stunning-and only 4.5 second individual exposures-I wouldnt have thought it possible to extract that much detail

straight to the pool room
Quote:
Originally Posted by RobF View Post
Wow - you must have beaten the seeing by taking so many short exposures. The resolution you have there is amazing. Top work and thanks for reminding us you don't need a top of the line SBIG to take good shots!!
Thank you Dr Paul, Narayan and Rob. This was captured at prime focus with 1300mm FL. I did try with a 5x Powermate first, but the surface brightness was just too low. I've found that in general many shorter exposures ultimately yields a higher resolution, just like with planetary imaging.
I did use the powermate on the Humunculus Nebula recently (http://www.iceinspace.com.au/forum/s...ad.php?t=56087), but that one also has a much higher surface brightness.

Quote:
Originally Posted by Bassnut View Post
Yes, thats an excellent shot, well done. With that result, I hope you try some other planetary nebs, quite a few are bright enough for short exposures.
Quote:
Originally Posted by Bassnut View Post
And.....Ive been thinking about this image, that was clever using a webby and powermate. The 5*magnification retained the resolution I had a lot of trouble with a CCD at prime when I tried it, and the large number of subs substituted nicely for the pain of guiding/AO. Yes, goes to show you dont need expensive gear indeed.
Thanks Fred, your image of this one is also spectacular indeed. As explained above, I did try with the Powermate but there just wasn't enough light at that image scale, it was very difficult to focus and I got a petter result just by using prime focus. However I think a 2x or 3x Powermate would be well suited, but I only have the 5x.

Quote:
Originally Posted by AlexN View Post
Fantastic effort.. and the comparison is quite amazing also... always remember when doing these sorts of comparisons... HST was a 100 billion dollar endeavor that cost substantially more than that once the optics were repaired and the cameras upgraded etc... I dare say your mount, newt and webcam did not cost you $100 billion + ? All things considered, you're image is rather amazing!
Thank you Alex, no not quite $100 billion Yes the HST was expensive indeed, still great though to sit and drool over its images on a cloudy day. And it certainly is great fun to image the same targets and compare.

Quote:
Originally Posted by TrevorW View Post
Bloody good image well done
Thank you Trevor

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Originally Posted by iceman View Post
Incredible work, nicely done Rolf. I love it when you do this stuff.
Thank you Mike, I enjoy doing it as well.
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