[USED] SIGMA 16 f/1.4 DC DN / Sony

Key Specifications Focal Length: 16mm (24mm full-frame equivalent field of view on Sony APS-C) Maximum Aperture: Ultra-bright f/1.4 (minimum aperture f/16) Lens Mount: Sony E-mount (APS-C dedicated) Optical Construction: 16 elements in 13 groups (including 3 FLD, 2 SLD, and 2 aspherical elements) Diaphragm Blades: 9 rounded blades for smooth background highlights Filter Size: 67mm Weight: 405g (14.3 oz) Autofocus Motor: Stepping Motor (STM) for quiet, fluid focus drive