When Matt Saville did his field review of the Sigma 18-35mm f/1.8, we knew immediately that this was a lens lineup to be excited about. Pye and I also did a gear talk on the Sigma 50mm f/1.4 and Anthony Thurston
I have tested the Sigma 200-500 on my Canon 1DsIII (21 megapixel, FF). The lens was mounted on a sturdy Gitzo 5541 LS tripod with a customized PhotoSeiki TB-101 head; I have used mirror lock up and self timer. The following images are 100% crop from the unprocessed RAW file. I ...