Combining a wide-angle perspective with a fast maximum aperture, this 12mm f/2 AF Ultra Wide-Angle Lens from Samyang is designed for APS-C format Canon RF-S-mount mirrorless cameras and provides an 18mm focal length perspective equivalent to 35mm full-frame format. Two extra-low dispersion elements and one aspherical element are incorporated into the lens construction to help control aberrations and distortions for increased clarity and sharpness. Ultra Multi-Coating has also been applied to all lens elements to reduce lens flare and ghosting for increased contrast and color fidelity. The bright f/2 maximum aperture excels in difficult lighting conditions and enables greater control over depth of field and focus placement. The Linear STM autofocus motor provides fast, quiet focus. A minimum focusing distance of 7.9" is available as well as a AF/manual focus selector switch. The lens barrel incorporates a focus selector switch. The seven-blade diaphragm to produce a quality of bokeh.