Comet Photography Lens Tests As the Rosetta comet landing approaches this morning, here's a collection of time-lapse videos I've taken of comets in the past year, testing different lenses, camera and mounting methods (fixed and star tracking). There were all fairly faint comets, not visible to the naked eye, requiring binoculars or a telephoto lens to locate. (One of the first sequences I labelled as being taken on a tracking mount was accidentally mislabeled, it should be fairly obvious once you see the following clips.) http://youtu.be/B-PCqS1KAT8?list=PLlLN6Bdq3jrl9OItgxV25czS-F1N1OLr7 #astrophotography #nightphotography #cometphotography Originally shared by Jeff Sullivan Photographing Comets Comet Siding Spring will approach Mars tonight and pass the red planet tomorrow, Sunday October 19, 2014. I performed many lens and exposure tests on Comet Lovejoy in late 2013 and early 2014, with and without a star-tracking mount. Here are some of the results, rendered as