I tested the Sigma 12mm f/1.4 – it's a perfectly portable prime for APS-C cameras, with a fast aperture for city and night shots

The world's widest autofocus lens for APS-C camera with f/1.4 aperture is a dream for astrophotography and city shots ...
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SIGMA Announces 18-50mm F2.8 DC DN | Contemporary, the Smallest and Lightest F2.8 Zoom Lens for APS-C Format Mirrorless Cameras

This exceptionally small, light and bright standard zoom for crop-sensor mirrorless cameras is the ultimate workhorse lens. SIGMA's first APS-C size mirrorless zoom lens has a versatile full-frame ...