Sigma 30mm F1.4 Art DC HSM Lens for Nikon Offering the bright F1.4 aperture and an angle of view extremely close to that of human vision Placed under the Art category, this large-aperture standard lens with an angle of view equivalent to 45mm on a 35mm camera A rear focus system prevents focus-dependent variation in aberration, making high-level image quality possible throughout the entire image Lens not zoomable Filter Size 62mm Maximum Magnifications 1:6.8