Opteka 7.5mm f/8 HDMC Fisheye Lens for Nikon 1 J5, J4, J3, J2, S2, S1, V3, V2, V1 and AW1 Digital Mirrorless Cameras Twelve-layer HDMC multi-coating reduces lens flare and ghosting for contrast-rich, color-neutral imagery Prime fisheye lens with a fixed f/8 aperture is designed for APS-C-sized Nikon 1-mount mirrorless digital cameras, where it provides a 35mm-equivalent focal length of 18mm All-glass optical construction housed within an aluminum alloy lens barrel featuring a built-in petal type lens hood Expansive 167 degree diagonal angle of view helps to render unique perspectives and emphasize close-up subject matter Made in Japan, 3 year warranty