Why are my stars trailing?
I tried to get a series of photos tonight of Machholz and M45 using my Canon 300D. There were 8 shots @ ISO800 varying from 5 sec exp to 10 sec exp with a number of multiple of 6 sec exp. I then took 4 shots @ ISO1600 @ 6 sec exp.
The lense was an EF 80mm - 200mm zoom set to 200 mm @ f/5.6. Seeing was only so so but I grabbed the shots quickly during a break in the clouds. Rather than get my scope out and set it up etc etc, I mounted the camera on a camera tripod. I felt that the exposure times would have been short enough not to have to worry about trailing.
Have I overestimated the time or is something else going on for as you can see from the image (cropped and enlarged from original) there is definately trailing going on.
Also would the blurriness below each star be caused by mirror slap?
|