While f/1.4 lenses are readily available for SLR systems, they're not as plentiful for mirrorless cameras, especially those that use smaller than full-frame sensors. The Sigma 30mm F1.4 DC DN Contemporary ($339) is a compact, bright, standard-angle lens, available for both Sony APS-C and Micro Four Thirds camera systems. It's a strong performer, capturing crisp photos and delivering strong control over depth of field. Design The 30mm F1.4 ($309.00 at Amazon) is fairly compact for an f/1.4 design. It measures 2.9 by 2.6 inches (HD), weighs just 9.4 ounces, and supports 52mm front filters. The barrel is a mix of metal and polycarbonate, but unlike the wider, pricier Sigma 16mm F1.4 DC DN Contemporary, the lens is not sealed to protect entry of dust and moisture. You can buy the lens in an E-mount version for Sony cameras with APS-C sensors, or for Micro Four Thirds cameras from Olympus and Panasonic. The APS-C sensor is larger, so the lens acts like a 45mm full-fame lens when paire...
The Sigma 30mm F1.4 DC DN Contemporary is a bright, crisp, standard-angle lens for Sony and Micro Four Thirds mirrorless cameras.
Bright aperture; Very sharp; Even illumination; Affordable
Some barrel distortion; Omits stabilization; Not weather-sealed