I don't normally shoot through my telescope, but this was the first time an eagle ever came by our own house (it was about a week ago), and I couldn't get any closer. It was ISO 1600, so probably around ISO 6400 after post processing. The (dobsonian) mount was very unstable, and I was holding the camera up to the light path since I didn't have an adapter. That's also the reason for some very strong flare and light leak.