Thanks guys,
Paul I used the 20Da with a Canon 200mm f/2.8 piggybacked on the EM200 mount.
Total exposure was approx 21 minutes @ 1600 ISO (17 sub frames) stacked using Registar with Levels and Curves in Photoshop.
Like I said I wish I had more exposure but I ran out of time.
Hopefully next time huh?
Yeah Right....
I showed the image to Don at Bintel and he said I must have bumped the mount to get the double comet effect......
