The Sony Sonnar T* FE 55mm F1.8 ZA is a full-frame standard prime for Sony FE E-mount cameras from the Zeiss-branded Alpha ZA series, featuring a Sonnar optical formula with 9 elements in 6 groups, T* anti-reflective coating, and an F1.8 aperture delivering outstanding sharpness and pleasing bokeh. It is widely regarded as one of the sharpest standard primes for any mirrorless system. This lens is part of Sony's Zeiss-branded FE prime lineup.
Product released: October 16, 2013
Latest firmware version
Version 02, released December 4, 2025
What's new in version 02
Name:Lens sytem software update Ver.02 for SEL55F18Z (Windows)Release date:04/03/2015Benefits and improvementsProvides the “Quick starting” function.This Lens system software update is available in E-mount body.Some models cannot be used for this update. (model list)Lens released after October 2014, (including lens SEL1635Z/SELP28135G) have the “Quick starting” function.