The Sigma 24-105mm F4 DG OS HSM ($899) is a standard zoom lens for full-frame cameras. Sigma sells it in Canon, Nikon, Sigma, and Sony mounts, and the lens is eligible for the company's mount ...

At $5,999, the Sigma 500mm F4 DG OS HSM Sports seems like an extravagantly priced lens. That is until you check out the competition: the $8,999 Canon EF 500mm f/4L IS II USM and the $10,299 Nikon AF-S ...

On paper, Sigma's decision to release two 150-600mm zoom lenses at the same time is an odd one. Both cover a zoom range that appeals to wildlife and sports shooters, but when you use the Sigma ...

The Sigma 100-400mm F5-6.3 DG HSM OS Contemporary telephoto zoom lens boasts and optical image stabiliser, fast AF and a dust- and splash-proof construction. Highly versatile, the 100-400mm F5-6.3 ...

Sigma's decade-old 150-600mm is still a best-seller, but Tamron exited DSLR production entirely. Let's explore what that ...

To be completely honest, 600mm is not a focal length with which I feel intimately familiar. But, when I got the chance to spend a few days with Sigma’s new 150-600mm F/5-6.3 super-telephoto zoom lens, ...

This is an exceptionally sharp lens. At 70mm, centrally sharpness is outstanding at f/2.8 and f/4, excellent from f/5.6 to f/11, very good at f/16 and still good at f/22. The edges are excellent from ...

If you've been unsatisfied with Sigma's development in Optical Stabilizer lenses, here's some good news for you. They've drop three new zoom lens at PMA 2008, with OS ability of 4 stops of light ...

The new Sigma 24-105mm F4 DG OS HSM offers a versatile focal range whilst being tack-sharp from 24mm to 80mm, particularly in the centre of the frame. Sharpness at 105mm isn't quite as good, or at the ...