Normal-length prime is designed for use with full-frame Canon RF-mount mirrorless digital cameras.Bright f/1.8 maximum aperture suits working in difficult lighting conditions and also offers increased control over depth of field.One precision-moulded (PMo) aspherical element suppresses spherical aberrations and distortion for high sharpness and accurate subject rendering.Super Spectra coating has been applied to individual elements to minimise ghosting and flare for greater contrast and colour neutrality when working in strong lighting conditions.STM stepping motor offers fast, quiet, smooth, and accurate autofocus performance that is ideal for video recording as well as still shooting.Configurable Control Ring can be used to adjust a variety of exposure settings, including aperture, ISO, and exposure compensation.Rounded seven-blade diaphragm contributes to a pleasing bokeh quality.