Sigma 35mm F1.4 Art DG HSM Lens for Nikon, Black, 3.7 x 3.03 x 3.03 (340306) Price: $639.95 (as of 11/05/2021 12:31 PST- Details)

35mm focal length, 52.5mm equivalent focal length on APS-C cameras, 56mm equivalent focal length on Canon APS-C cameras
F1.4 maximum aperture; F16 minimum, This model is compatible with all current Nikon cameras (both DX and FX)
Ring-type ultrasonic-type AF motor with full-time manual focusing