PixInsight > Gallery
The "Big E"
twade:
To all,
Here's a wide-field image of what I call the Big E. It's numerous dark nebula coming together to form a visual "E" between Scorpio and Sagittarius. It's really cool looking from a dark site. This was taken with a Canon 5D2 and a EOS 200mm f/2.0L stopped down to f/4.0. It is an integration of 25 four-minute exposures. It was calibrated using six dark frames, twenty biases, and twenty flats. All calibration and processing was done in PixInsight.
Here's a higher resolution to browse through http://www.northwest-landscapes.com/images/deepsky/wide-field/big_E_5d2_200mm_1600x2400.jpg
Thanks for looking,
Wade
ajbarr:
Wade great job with that camera. What ISO do you use? Also if this is guided did you dither?
Great job
Albert
ajbarr:
BTW do you do your darks separately or are they in camera darks?
Thanks
twade:
Albert,
--- Quote ---Wade great job with that camera. What ISO do you use? Also if this is guided did you dither?
--- End quote ---
Thanks. Oops, I forgot to mention it was shot at ISO 1600. It was guided and dithered.
--- Quote ---BTW do you do your darks separately or are they in camera darks?
--- End quote ---
I use Maxim DL for all my frame gathering. I start taking the darks at the beginning of morning astronomical twilight. I generally start putting things away while waiting on the darks to complete. I then take the flats, and finally the biases. If I have two cameras imaging, I take flats on one and darks on the other since I only have one Flat-Man. As soon as the flats are done, I start taking darks with the second camera.
Wade
ajbarr:
Thanks. I use Maxim too but have recently tried Backyard. Cool program. It's encouraging to see you get such good results with only 6 darks. I keep a library for my ccd darks but the temperature is consistent because of the internal cooler. I am definitely going to do it the way you do my next chance at a dark site with no moon.
Thanks for the tips.
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