Sonnar T* E 24mm F1.8 ZA Wide-Angle Prime Lens
This high-performance Carl Zeiss wide-angle prime lens delivers superior corner-to-corner sharpness even at the maximum F1.8 aperture. It also focuses as close as 16cm providing an unusual combination of close focus and wide-angle perspective. The 24mm focal length is an excellent choice for general shooting.
When changing your aperture to defocus the background, the light sources appear blurred. This bokeh effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. a lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.
ED (Extra-low Dispersion) glass
As focal lengths get longer, lenses built with conventional optical glass have difficulties with chromatic aberration, and as a result images suffer from lower contrast, lower color quality, and lower resolution. ED glass dramatically reduces chromatic aberration at telephoto ranges, and provides superior contrast across the entire image, even at large aperture settings. Super ED glass provides enhanced compensation for chromatic aberration.