The sigma 30mm f14 dc hsm is a fast aperture f14 lens with an angle of view similar to that of human vision from 40cm 157 minimum focusing distance to infinity this prime lens creates very sharp vivid and detailed images and is suitable for cameras with an aps c sensor from an early stage flare and ghosting are thoroughly measured to establish the design which is resistant to strong incident light such as backlight sigmas super multi layer coating reduces flare and ghosting and pro