Sony's APS-C ultra-wide zoom with OSS — 15-27mm equiv at constant f/4 for Sony E-mount.
The Sony E 10-18mm f/4 OSS was released approximately 2012 as a constant f/4 ultra-wide zoom for Sony E-mount APS-C, covering 15-27mm full-frame equivalent. Twelve elements in 8 groups. Seven aperture blades. 62mm filter thread. At approximately 225g. 0.25m MFD. OSS optical stabilisation.
Twelve elements in 8 groups (aspherical elements). Seven aperture blades. The 62mm filter thread. At approximately 225g. Minimum focus distance of 0.25m. OSS (Optical SteadyShot). f/4 constant aperture. APS-C image circle (15-27mm equivalent). Sony E mount.
The E 10-18mm f/4 OSS provides ultra-wide coverage for APS-C Sony E bodies: at 15-27mm equivalent it covers from near-fisheye to moderate wide-angle. The f/4 constant aperture maintains consistent exposure across the range. The OSS stabilisation is relevant for APS-C bodies without IBIS (NEX, early A6000-series).
On the used market the Sony E 10-18mm f/4 OSS is affordable as a compact APS-C ultra-wide zoom. Condition checks: OSS engagement, AF response, 62mm front element for marks. APS-C only. Compatible with Sony E-mount APS-C bodies.