The Sigma I Series is a group of full-frame-compatible lenses emphasizing the ideal mixture of performance and compactness for mirrorless shooters. Combining high optical performance with a stylish and sleek design, these lenses are well-matched to contemporary mirrorless cameras and shooters who prioritize lenses with a high degree of usability, portability, and capability.
- I series lenses have an all-metal construction, including precision-cut aluminum parts on the barrel that offers an elegant finish that's equally durable. Metal materials are also used throughout the internal construction for added robustness and reliability that is inspired by Sigma's Cine lens lineup.