The Sonnar T* FE 55mm f/1.8 ZA Lens is an ideal companion for full-frame Sony E-mount cameras, delivering outstanding resolution and a luminous f/1.8 aperture, making it an excellent choice for photographers in search of a high-quality normal-length prime lens.

ZEISS Optical Design

This lens, inspired by the ZEISS Sonnar optical concept, incorporates a configuration of seven elements arranged in five groups. This design facilitates a substantial maximum aperture of f/1.8, effectively minimizing flare and enhancing contrast. The bright f/1.8 maximum aperture enables users to produce images with a shallow depth of field and to operate in low-light environments with considerable ease.

The lens design incorporates three aspherical elements, two of which are double-sided, aimed at mitigating astigmatism, field curvature, coma, and various other monochromatic aberrations. Each lens surface is treated with ZEISS T* anti-reflective coatings to reduce reflections, thereby enhancing image clarity, contrast, and color accuracy. Additionally, the rounded nine-blade diaphragm enhances the aesthetic quality of bokeh when utilizing selective focus techniques.

Autofocus and Design

The linear autofocus motor combined with an internal focus mechanism ensures rapid and precise autofocus capabilities, allowing for accurate and silent focusing during video recording. Additionally, the dust- and moisture-sealed construction enhances usability in adverse weather conditions, while the rubberized control rings improve handling in lower temperatures.