(From Sony lens literature) The new Zeiss Sonnar T* 55mm F1.8 lens is another high-quality Carl Zeiss prime lens that has an extra-bright F1.8 maximum aperture for pro-style background defocus effects, making it an outstanding choice for portraiture, low-light shooting and everyday photographic assignments lens. It also has a nine-bladed circular aperture, is dust and moisture resistant and Carl Zeiss T* coating.
