Beautiful bokeh meets low-light performance in an ultra-compact, lightweight lens with incredible sharpness.Fast F1.4 maximum apertureThe maximum aperture of F1.4 provides excellent low-light performance, and creates beautiful background blur to separate subjects from the environment.Dust and splash resistant mountRubber sealing at the lens mount helps to keep dust and other foreign bodies from entering the lens or the camera's sensor chamber.tsc (Thermally Stable Composite)Parts made with Tsc versus aluminum deform less, further contributing to the high-precision construction of the lens.Compatible with In-CameraThis function performs in-camera corrections of peripheral illumination, chromatic aberrations, distortion, and more, to further enhance image quality (available on supported cameras only).Aberration CorrectionThe optical design of this lens makes it resistant to strong incident light sources such as backlighting, and Sigma's Super Multi-Layer Coating further reduces flare and ghosting.Flare and ghosting reductionHigh-precision, rugged brass bayonet mount The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.Made In JapanAll Sigma's manufacturing - right down to the molds and parts - is carried out under an integrated production system, entirely in our facility in Aizu, Japan.For crop sensor mirrorless camerasSIGMA's Dc Dn lenses are made exclusively for mirrorless, and are designed primarily for use with crop sensor cameras..