Sony's premium APS-C standard zoom — 24-105mm equiv at constant f/4 with Zeiss T* and OSS.
The Sony E 16-70mm f/4 ZA OSS Vario-Tessar T* is a constant-aperture standard zoom for Sony APS-C E-mount cameras, co-developed with Zeiss under the ZA (Zeiss Alpha) designation. The Vario-Tessar T* branding indicates a Zeiss zoom optical design with T* coating. Covers approximately 24-105mm equivalent. Sony E mount.
f/4 constant aperture. 16-70mm zoom range (approximately 24-105mm equivalent on APS-C). ZA (Zeiss Alpha). Vario-Tessar T* optics and coating. OSS (optical steady shot). At approximately 308g. 55mm filter thread. Sony E mount (APS-C).
The Vario-Tessar designation applies the Zeiss Tessar optical formula principles to a zoom design with T* anti-reflection coating. The constant f/4 provides consistent exposure across the 16-70mm range. OSS stabilisation is independent of body IBIS. The ZA branding and optical design place this above standard Sony E-mount kit zooms in optical quality.
On the used market the Sony E 16-70mm f/4 ZA OSS Vario-Tessar is a premium constant-aperture standard zoom for Sony APS-C cameras. Condition checks: OSS engagement, ZA Vario-Tessar front element and T* coating for marks, zoom ring smoothness, Sony E mount contacts. APS-C coverage only.