Comet C/2012 S1 (ISON) Enlarged - November 20, 2013

Comet C/2012 S1 has become much brighter since my last image on Nov. 15. The wind gusts that accompanied us that morning made it difficult to set up and image the comet. Fortunately, I was able to block some of the wind by moving my tripod close to a nearby barn. Unfortunately, I had to image in astronomical twilight again. Twilight and moonlight reduced the contrast and washed away any details in the tail. The image is cropped and covers a field of 4.2 x 2.8 degrees.

6 images x 37-second subframes, Total= 3.7 minutes. Canon 24-105 f/4L lens (imaged at 102mm f/4), Unmodified Canon T1i DSLR, Astronomik CLS Light Pollution filter, ISO 800, iOptron SkyTracker on a heavy duty camera tripod. Alignment, combine and digital development processing by Images Plus 3.82b. Additional processing using Adobe Photoshop.  Ashby, MA, 20 November 2013.