I took this from my community park tonight with the Canon 10D, 300mmf2.8 with doubler. The actual fstop I used is 6.3 at 1/10 of a second and asa 100. Next time I am going to try asa 400 and f5.6
I wish I had a straight 600mm. All lenses are Canon.
I also am considering a Meade schmidt Newtonian at f4. There are several tecniques for astrophotography to be used with a telescope.
I waited two hours for the moon to come up. I had more closer to the horizon, but atmospheric disturbances made the focus too soft as well as the exposure ended up being too short. Next time I will use asa 400.