Sigma's compact Art-line normal prime for APS-C mirrorless — 45mm equiv at f/2.8 in tiny package.
The Sigma 30mm f/2.8 DN Art was released in 2012 as a compact normal prime for Sony E-mount APS-C, providing a 45mm full-frame equivalent perspective. Seven elements in 5 groups including aspherical elements. Seven aperture blades. 46mm filter thread. At 140g. 0.30m MFD.
Seven elements in 5 groups (2 glass-molded aspherical + 1 double-sided aspherical elements). Seven aperture blades. The 46mm filter thread. At 140g the lens is very lightweight. Minimum focus distance of 0.30m. Stepping motor AF for quiet, fast focusing. f/2.8 maximum aperture. APS-C image circle (45mm equivalent). Sony E-mount.
The DN (Digital Neo) Art designation indicates Sigma's Art-tier optics in a lens designed natively for mirrorless mounts: the DN line was Sigma's first mirrorless-native series, designed from the outset for Sony E and MFT registration distances. At 140g and 46mm filter thread the lens is the lightest in the Sigma Art lineup, designed for the compact APS-C mirrorless form factor.
On the used market the Sigma 30mm f/2.8 DN Art is very affordable as a compact Sony E normal prime. Condition checks: stepping motor AF response, 46mm front element for marks. APS-C (Sony E). Compatible with all Sony E-mount APS-C bodies; 1.5× crop applies on FE full-frame.