Now THAT's what I want to do! Took some non-tracked practice shots last weekend, but definitely need more exposure time, and that will mean tracking it.
Nice shot. Really like the inclusion of the foreground trees.
Amazing shot (and amazingly clean sensor for that matter!) I know that the trees add to the image, but it seems like they take the space away from the sky - leaves me hungry for more though.
Did you use a barn-door mechanism to follow the rotation? I'd be curious to learn more about how you took this shot.