C/2011 L4 (PANSTARRS) with Apo-Elmarit-R 180mmF2.8 April 21, 2013UTC
I tried imaging of the comet during the short dark window on April 21, 2013.
equipment: Leica Apo-Elmarit-R 180mmF2.8 and EOS 5Dmk2-sp2, modified by Seo san on EM-200 temma 2 jr, autoguided at the center of coma condensation with Takahashi FS-60c, Starlightxpress Lodestar Autoguider, and PHD Guiding via GPUSB
exposure: 4 times x 15 seconds, 17 x 60 sec, 4 x 180 sec, and 6 x 240 seconds at ISO 3,200 and f/2.8
First exposure started at 17:03:48 and the last at 18:28:23 April 21, 2013UTC
site: 4,500 feet above sea level at 36 25 36.2N 138 33 32.8E in Karuizawa, Gunma