I imaged Comet Lulin on Tuesday morning but only managed to get 7 subs at 4 min. each before heavy fog rolled in. I measured the ion tail to be 2 degrees long in my image.
Canon EF 200mm f/2.8L II Camera Lens at f/2.8, Focus with homemade Bahtinov Mask, Piggybacked on Celestron C8 Fork Mount, Canon XTi, 7 X 240 sec. exposures, ISO 800, Median and average stack on comet nucleus.