Digital Photography Tips and Techniques

Being a owner of five quality Sigma EX lenses, I am happy and impressed with the latest Sigma lenses announcements at PMA 08. The gigantic green beast Sigma 200-500 f/2.8 EX DG is a showcase of Sigma’s achievement in the photography lens market. Labeled as the “ultimate wildlife lens”, APO 200-500 f.2.8 is “the world’s first lens to offer an f/2.8 aperture at 500mm focal length”. It was actually displayed at PMA 2007 as prototype. Read More…