A sigma is someone who values being true to themselves over conforming to expectations just to "fit in." Many teens are drawn to the sigma identity as it celebrates individuality and breaks from ...

Sigma Lithium said it resumed mining activities at its Mine 1 in Vale do Jequitinhonha in Brazil, concluding the restructuring of mining operations aimed at increasing operating efficiency.

Sigma's bokeh master is a hefty and pricey bit of glass, but it can shoot some of the dreamiest portraits you'll see ...

In February, Sigma announced the Sigma BF. It's a full-frame, interchangeable lens camera with just a shutter release, a dial and three buttons. That minimalism speaks to me, and I felt the BF was ...