M31 with a Sigma 70-300mm lens
Posted 03 November 2013 - 03:06 PM
Here are the technical specs:
Taken with a Sigma AF 70-300mm f/4-5.6 APO DG at 200mm, Canon T3i DSLR, and Celestron Advanced VX mount. Consists of 35 light and 35 dark frames, each a 90-second exposure at ISO 800, and 21 flat frames, stacked in DeepSkyStacker and processed in Photoshop.
High-resolution version here: http://www.flickr.co...in/photostream/
Posted 03 November 2013 - 03:33 PM
Posted 03 November 2013 - 03:37 PM
Posted 04 November 2013 - 03:51 AM
Posted 04 November 2013 - 08:23 AM
Posted 04 November 2013 - 09:49 AM
That being said, your processing, acquisition and overall look is great.
Posted 04 November 2013 - 10:37 PM
Posted 05 November 2013 - 02:20 AM
On the star issues what f-stop where you shooting with? If you were shooting wide open or close to it then you might want to try going down a stop or two to see if it resolves your problems. Doing AP with a regular camera lens is a great way to see all the aberrations that don't normally present themselves in terrestrial photography thanks to all of those point-source lights in the sky
Posted 05 November 2013 - 10:42 AM