So if I understand this correctly, you took a 5 minute exposure, unguided (Meaning this is just the Gemini (II?) holding the aim mechanically?
It appears amazingly sharp for 5 minutes unguided. Quite a credit to the Gemini and the mechanics of the Losmandy mount.
Very nice test Brian, and encouraging results.
Your dropbox file is a .fit format though.
What do you use to work with .fit files?
