A high-performance single-focal-length standard lens for "E-mount" cameras, compatible with 35mm full-frame sensors and featuring a wide aperture of F1.8. It is designed with dust and moisture resistance in mind. "T* (T-Star) Coating" and the latest lens barrel design technology that reduces internal reflections achieve excellent tonal reproduction and high resolution from highlights to shadows. The newly designed 9-blade aperture maintains a circular shape from the maximum aperture to two stops down, allowing for beautiful bokeh effects. For more details, please see here: https://www.sony.jp/ichigan/products/SEL55F18Z/spec.html