|Comet C/2013 US10 Catalina at 6;10 am December 1, captured on a Canon 5DMarkIII with 85mm lens|
I also captured it at 300 mm on a Canon EOS 70D (right). Due to bright moonlight, its tails were not easy to pick up, even at an effective focal length of 480 mm. Over the coming week, the sky will get darker as the moon approaches its new moon phase, so the Comet and its tails should get progressively easier to see. In the meantime, using a tracking mount would enable brighter exposures with less noise, so better results than this quick catch on a fixed tripod are certainly possible, but the best results should come as the moon gets out of the way November 8 and later, weather permitting.
|Catalina with Venus & moon 12/7|
My 85 mm shot at the top is a four second exposure at f/2.8, ISO 3200 on a standard tripod with no sky-tracking mount, so many DSLR owners can start capturing it, whenever the sky is clear for them in the next week or two.
You can look up the comet in an app such as SkySafari+ to see exactly when it will rise in your location each morning.
Good luck with your viewing and photography! Weather permitting, I hope to have some results to show you at some point in the December 7-14 timeframe! Here are some of my prior comet photos on Flickr to entertain you in the meantime: https://www.flickr.com/search/?user_id=23183960%40N00&sort=date-taken-desc&text=comets&view_all=1
If you have a dark sky, watch for Comet Catalina before dawn! https://t.co/ELSmctWqCP pic.twitter.com/W5DzanagA0— EarthSky (@earthskyscience) November 23, 2015