Sigma Pi Chapter of Omega Psi Phi Fraternity Inc. celebrated 50 years of making a difference in the community by helping the ...

This lens from Sigma however, is EX branded and aimed much ... Click on each comparision photo below to view full size versions 50-500mm set at 50mm and f/8 50-500mm set at 500mm and f/8 50-500mm ...

Central sharpness is excellent at f/2, outstanding from f/2.8 to f/5.6. excellent at f/8 and f/11, very good at f/16 and good at f/22. The edges are excellent at f/2. outstanding at f/2.8 ...