This medium-focus, manual, autofocusing telephoto lens provides a 35mm-equivalent focal length of 157mm and gives images a soft bokeh (out-of-focus) background effect. Two ED (extra-low dispersion) elements enhance quality by correcting chromatic aberration, while a ghostless coating prevents refraction on the lens’ inner surface. The result is a sharper image with higher contrast.
Added is an Inner Focusing (IF) mechanism to improve speed and reduce lens extension. Photographers, in response, can get a closer minimum focus distance.