Oshiro 8mm f/3.5 LD UNC AL Wide Angle Fisheye Lens for Nikon D5, D4s, D4, D3x, Df, D850, D810, D750, D610, D500, D7500, D7200, D7100, D5600, D5500, D5300, D5200, D3400, D3300 Digital DSLR Cameras 8mm f/3.5 manual fisheye lens compatible with full-frame sensors (produces a full circle) as well as APS-C sensors 10 lens elements in 7 groups, Low dispersion ultra nano crystal multi-coating anti-reflection optical glass Ultra-fast f/3.5 maximum aperture and rounded eight-blade diaphragm for superior depth-of-field view angle AL aspherical lens element for high image quality with improved performance Equivalent to 12mm in the 35mm APS-C format