Oshiro 8mm f/3.5 LD UNC AL Wide Angle Fisheye Lens for Sony Alpha E-Mount a9, a7r, a7s, a7, a6500, a6300, a6000, a5100, a5000, NEX-7, NEX-6, 5T, 5N, 5R, 3N Digital Mirrorless 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