Sigma 12-24 vs. Sigma 12-24 II at center
http://www.pbase.com/davidjl/image/136978613/original

Sigma 12-24 vs. Sigma 12-24 II at corners
http://www.pbase.com/davidjl/image/136978650/original


http://www.pbase.com/davidjl/image/136978377/original
http://www.pbase.com/davidjl/image/136978506/original
http://www.pbase.com/davidjl/image/137090742/original