Hi all, this is a 35 second exposure taken with Sigma 15mm f2.8 fisheye lens and Canon 5D MK II at ISO 1600. There isn't any vignetting with this lens even when wide open. The zodiacal light can be seen at bottom right.
http://i638.photobucket.com/albums/u...psc933afd5.jpg
Here is a image of Aurora Australis taken on the 1-10-12 with the same lens, south of Pt Lincoln. this was a 29 second exposure with camera at ISO 3200.
http://i638.photobucket.com/albums/u...psd4ae3cd9.jpg