Sigma I Series Lenses for Full Frame Mirrorless: Outstanding Performance and Compact Size

Sigma offers a series of seven compact prime lenses in their Contemporary lineup ranging from 20mm f2 to 90mm f2.8 that they designate as the I Series. Compatible with Sony E and Leica L mount systems, the lenses feature predominately metal construction, superb build quality and a high class look of a higher priced optic. They feel good in the hand and deliver outstanding results.