Holmes.
Elementary, My dear Watson.
All it takes is an el-cheapo 300mm f/5.6 lens, ISO1600, 10 secs of exposure and a Canon EOS 400D.
Here’s Comet holmes. With the wispy double-coma.
http://picasaweb.google.com/pavan.k.murthy/Holmes?authkey=wvKJ_sYLn_Q