Review: Sigma 20mm F/1.4 DG Art By TDP
Bryan at The-Digital-Picture has completed his review of sigma’s unique 20mm f/1.4 DG Art series lens. This is the widest f/1.4 lens you can get for your full frame DSLR. As...
http://www.canonrumors.com/review-sigma-20mm-f1-4-dg-art-by-tdp/