This is Rokinon's newest fisheye lens for Sony E-Mount DSLR. It features some great new featurers that are not available on Rokinon's first highly rated 8mm f/3.5 fisheye lens. Optics and glass are high definition (HD) with very clear & sharp images. This lens also features a removeable hood which can make it easier for use on full frame cameras. While this lens is designed for APS-C sensors, full frame users can now use it without the hood.