It’s not too late to photograph comet PanSTARRS with a normal camera lens. The image above was taken tonight (April 4th) using a Canon EF 300/4L lens along with an EOS 7D. This image is actually 16 shots stacked together, each shot being 1s at f4 with ISO set to ISO 6400. The comet was not visible to the naked eye and was quite difficult to see even in binoculars. However it  still photographed pretty well one the lens was pointed in the right direction!