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Friday, May 14th, 2010
My first multi-day image (M51)
 
Location= Portland, Downtown
 
After a lot of trial and error and great help from Neil, I have been able to produce my first multi-day shot.
 
When you count light, darks, bias and flats, it is about 377 RAW files or about 4Gb of images.
 
I took the following shot on two different days: 4/22/2010 and 5/14/2010.
 
I've had to overcome many issues and perfect the process as much as I can.  Part of the 5/14/2010 shot is across the Meridian, and the shots were taken at different chip temperates that range from 50F to 70F.
 
The total exposure is about 3hr. and 34 min (1min. subs).  I have about 60 darks, 30 flats, and 30 bias.
 
ISO = 800
Mount = HEQ5 Pro (Aka Sirius)
Main Telescope = Mak 150 FL=1800
Main Imaging Camera = Canon 40DH
Autoguiding = ST80 + SSAG + PHD
 
 
Processing=DSS Sigma-Kappa Clipping, G2V color calibration, Photoshop, Carboni Tools, Gradient XTerminator, Ninja Noise.
 
Enjoy it!
 
M.


Image Gallery For This Session
M51 dss cmp ps web
   

M51_dss_cmp_ps_web.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 05/15/10 at 06:08pm Neil wrote:
Thanks Neil! Yes, I have stamina to keep going at it and see how long it takes to take a great show from a high LP location like Portland Downtown. We will probably come up with a ratio some sort of ratio for exposure time. I know M51 is bright, but still, it is a Galaxy and it is pretty challenging object when LP is present.

Now, I'm enjoying the process a tone. It is very rewarding to find the problems, solutions and get visibility to the end-to-end process. I'm starting to see a ligh at the end of the worm hole. :)

On 05/15/10 at 05:58pm Neil Heacock wrote:
Now this is panning out Miquel! Keep going if you have the stamina on the same object. I'd like to see what this looks like after 10 hours or something. It's really starting to shape up and grow in signal now.

-Neil



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