Opteka 9mm f/8 HDMC Fisheye Lens for Panasonic Lumix DMC GM5, GH4, GM1, GX7, GF6, G6, GH3 G1, GH1, GF1, G10, G2 GH2 and GF2 Mirrorless Digital 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 Panasonic Micro Four Thirds 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