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 ...

These days, camera lenses aren’t just simple bits of glass in sliding metal or plastic housings. They’ve often got a whole bunch of electronics built in as well. [Dan K] had just such a lens from ...

A redesign of Sigma's 150-600mm Sports zoom lens, specifically for L Mount and Sony FE mount cameras brings this massive optic to the mirrorless world. Inevitably, it is big and it is heavy, but ...

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 ...