Ballard wrote:
Very nice shots. At 400mm you get a bit of star trailing (1 sec is about the max exposure to avoid seeing star trails at 400mm). If you can mount it with the C11 on a equatorial mount running a sidereal rate you can take a much longer exposure (at least until the actual motion of the comet starts to impact the exposure, probably at least 45 minutes or so).
At my home location I have a large obstacle to viewing the eastern horizon. The Sandia mountains rise over 5,000 feet to my East blocking my view of the horizon. Since this is such a short time event I have to travel for my shots and really don’t want to setup my CGGM Mount in the dark so I made some sacrifices.
I initially used a 200mm lens and wanted to push the limits so to speak with this session pushing the time until I had a minimal amount of trailing.
I’m looking forward to being able to shot in the evening from home even though the comet is going to start fading.
Thank you for the compliment.