IDEAL APERTURE WITH NINE BLADES: The finely tuned features of the optical design on ZEISS SLR lenses ensure a spectacualr bokeh, with particularly harmonious effect of the blurred areas of the image. The nine diaphragm blades and the resulting, virtually circular aperture on ZEISS SLR lenses are crucial to favorable rendition of highlights in the foreground and background. PRECISE MANUAL FOCUS: Manually focusing a lens means controlling the image result from your fingertips. A good ergonomic design makes all the difference. ZEISS lenses stand out with their large rotation angle which enables precise focusing. Changes are immediately visible in the viewfinder. The high-quality focusing mechanism moves smoothly without play, thus also supporting the intuitive interaction with the focal plane. ELABORATE STRAY LIGHT REDUCTION: Rich, vibrant colors are vital to creating a lasting impression. Stray light in the lens, however, would lead to a brightening of the image, which is particularly visible in shadow areas. We combine various, elaborate techniques to reduce unwanted stray light, such as the famous ZEISS T* anti-reflective coating and a special jet black paint that is applied by hand to all lens element edges to ensure that reflections are prevented from the start. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.