For reference, Sony 400mm f/2.8 GM OSS and 600mm f/4 GM OSS lenses are among the best in the world, but they each cost over £10,000 / $12,000 / AU$15,000. The Sigma 300-600mm f/4 could deliver ...

Sigma kicks off CP+ week with the launch of the ... They have also been known for unique offerings, such as the APO 200-500mm f/2.8 EX, which is one of the most specialized designs we have ...

At 28mm, central sharpness is very good all the way through from f/2.8 to f/22. The edges are good at f/2.8, very good from f/4 to f/16 and just fair at f/22. At 35mm, central sharpness is very ...