Combining a wide-angle perspective with a fast maximum aperture, this Samyang 24mm f1.8 AF Lens is designed for full-frame mirrorless cameras and provides a 36mm equivalent focal length when used on an APS-C camera body. Two extra-low dispersion elements, three high refractive index elements, and two aspherical elements are incorporated into the lens construction to help to 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/1.8 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, and the lens barrel incorporates a custom function switch and a focus hold button for optimal focus control. The nine-blade diaphragm to produce a quality of bokeh.