>>4199118at iso 400, f11, 5-10 seconds gives good results.
I think 30 seconds might be excessive, it's gonna look like the ending of 2001 a space odyssey
Here's a 7 second exposure I took on my XT-1 before I switched to film for the main event.
I guess we'll find out in a day or two how I did but most of the time I just counted to ten 1 thousand or so