Image Quality Sigma provided the lens in a Canon mount, so I used the 20-megapixel, full-frame EOS 6D ($1,999.99 at Amazon) to test the image quality it's able to deliver. We normally use Imatest to ...

Whenever we go to a photo tradeshow, there are always people in the Sigma booth who want a chance to shoot with their massive green 200-500mm APO lens. Now, however, they have someting with even more ...

The Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary ($1,089) is a big, heavy lens. But that's no surprise when you consider its maximum reach, full-frame sensor coverage, and sturdy build. A strong ...

The Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary lens offers very similar image quality to the Sports version at a cheaper price, whilst being much lighter and therefore more suitable for ...

The Canon EF 100-400mm f/4.5-5.6L IS II USM is a new professional telephoto zoom lens for full-frame DSLR cameras. Is this the perfect do-it-all super-telephoto zoom lens for wildlife and sports ...