This is my picture of the comet PAN_STARRS taken at 8pm on March 18,2013 at the top of Signal Hill. The sky cleared for about 20 minutes and allowed a few members of the RASC to observe and photograph the comet which was about 10 degrees above the horizon.  This photo is a stack of 5 images taken with an ED 200mm f 2.8 Nikon lens and my D-50 DSLR. The exposure time of each image is 3 seconds.