Sigma has just announced an impressive quartet of lenses that should have photographers and videographers alike reaching for their wallets. The Japanese lens manufacturer is launching three new ...

The Sigma 300-600mm f/4 DG OS Sports was referred to by the company's CEO, Kazuto Yamaski, as a "dream lens" – and it's easy to see why. When it comes to telephoto reach, you often need a lens that ...

The Sigma 300-600mm F4 DG OS Sports ($5,999.99) is an absolutely massive lens. Its optical formula, which delivers the previously unrealized combination of a super telephoto focal range, a bright F4 ...

Data are means ± SE. Relative changes of indicated transcripts and immunoblots of indicated proteins in cultured C57Bl/6 islet extracts treated with PBS or 20 nmol/l exendin-4 for 0, 2, 4, 6, 8, and ...

The synthetic version of a compound in lizard venom seems to complement insulin and help people with diabetes steady their sugar metabolism, a new study finds. The drug, called exendin-4, is a protein ...

Photo News: Sigma has updated its mirrorless lineup with the 50mm f/1.4 DG DN Art Lens for L and E-mount cameras NEW YORK--(BUSINESS WIRE)--B&H is pleased to announce Sigma’s 50mm f/1.4 DG DN Art lens ...