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Tuesday, July 6th, 2010
 Finally, an opportunity to do some imaging.   The conditions were not ideal...some light haze, but considering the poor weather in June, it was pretty good.
 
After getting a late start, I had some problems getting back into gear.  It took me too long to get the scope aligned, and centered on my target.   Naturally the camera then refused to respond to Nebulosity.......that took another 1/2 hour of fiddling to get that to work right.  Then I was 11 frames into the sequence before I realized I hadn't fine focused.   So, I stopped, re-focused, and started again.   Considering these issues, I decided not to attempt getting my guide camera working....and thus limited my exposures to 60 seconds.
 
NGC 6888, the Crescent Nebula in Cygnus:
100 frames at 60 seconds per frame @ ISO 1600
cropped & full frame
 
6" Orion imaging Newtonian
Celestron CG5 GT mount  (unguided)
Canon 350D  (unmodified)
 
Captured in Nebulosity
Aligned and stacked in Deep Sky Stacker
Processed in Photo Shop Elements with Carboni tools & Gradient exterminator
 


Image Gallery For This Session
Crescent Nebula NGC6888 7 5 10 100x60sec ISO1600 Crescent Nebula sm2
Crescent full frame sm
   

Crescent_Nebula_NGC6888_7_5_10_100x60sec_ISO1600.jpg
Click picture above for larger version
If the picture seems too bright or too dark, try adjusting the brightness below.
Brightness:
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Comments:
On 07/06/10 at 07:01pm Barry wrote:
Thanks Neil. I am not too unhappy with it.....picked up a hint of the interior detail. I just love Milky Way objects. The star fields are cool.

I could tell I had good polar alignment....no drift at all. Probably should have taken the time to get the guide camera working, but just too tired to deal with it....still recovering from 5am-9pm days at the race track in the heat.

On 07/06/10 at 06:19pm Neil Heacock wrote:
For the things that went wrong, your fine focus routine sure worked. Your diffraction spikes are sharp and the stars look good. Your polar alignment was good too as I see that the stars are round (with the exception of the ones distorted by coma of course).

-Neil



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