During the evening hours of april 1, 2013 I photographed comet C/2011 L4 PANSTARRS, now for the first time with my Astrotrac Travel Mount. Sky was very good, only at low altitude there was some haze (due to moisture or dust) and dusk.
Picture below is a stack of 4 images of 60 seconds, taken with my Canon EOS 40D, a Canon EF 200 mm F 2.8 (F 3.2) telelens and a IDAS LPF clip-in filter. Also added darks and bias frames. Time: 19:55 UT. The comet was at that time at a height of only 12 degrees above the horizon.
Picture 1: Comet C/2011 L4 PANSTARRS and the Andromeda galaxy (Messier 31). Click on the image for a larger version.
Mount: AstroTrac Travel Mount
Camera: Canon EOS 40D
Lens: Canon EF 200 mm F 2.8 type L lens.
Filter: IDAS LPS filter
Accessories: TC 80N3 timer controller,
Location: Groevenbeekse Heide, Ermelo (5,4 east, 52,2 nort)
Software: DeepskyStacker, Corel Paint Shop Photo Pro X12
Description: stack of 4x60 seconds, 1250 iso, F 3.2
Picture 2: my Astrotrac Travel Mount during dusk of april 1, 2013. Click on the image for a larger version.