Sigma's tiny Art-line wide prime for APS-C mirrorless — 28.5mm equivalent at f/2.8 in a pancake-like body.
The Sigma 19mm f/2.8 DN Art (model A012) was released approximately 2012 as an APS-C wide-angle prime for Sony E-mount and other mirrorless APS-C systems. DN (Digital Neo) confirms mirrorless-native APS-C image circle design. At 160g and 46mm filter thread it is very compact. 28.5mm full-frame equivalent perspective. Seven rounded aperture blades. 0.20m MFD.
The optical design uses 8 elements in 6 groups with 1 aspherical element. Seven rounded aperture blades. The 46mm filter thread is very compact. At 160g the lens is very lightweight. Minimum focus distance of 0.20m. Electronic aperture contacts. f/2.8 maximum aperture. APS-C image circle (28.5mm full-frame equivalent on Sony E APS-C bodies).
The Sigma DN Art series was Sigma's first mirrorless-native lens line: designed specifically for the short flange distance of Sony E-mount and similar systems rather than adapting a DSLR formula. At 160g and 46mm the 19mm DN is among the lightest wide-angle primes for Sony E APS-C. The 0.20m MFD enables very close environmental wide-angle compositions for street and documentary photography.
On the used market the Sigma 19mm f/2.8 DN Art is very affordable as a compact APS-C wide prime. Condition checks: AF response, 46mm front element for marks. APS-C only — on full-frame FE bodies, APS-C crop mode required. Compatible with Sony E-mount APS-C bodies.