This is Samyangs newest fisheye lens for Nikon It features some great new features that are not available on Samyangs first highly rated 8mm f35 fisheye lens Optics and glass are high definition (HD) with very clear & sharp images This lens also features a removable hood which will 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 On APS-c cameras like the Nikon D5100D3200D3100, the pictures will fill the entire frame or screen On full frame cameras like the Nikon D4 & D800, the lens will produce pictures with a semi-circular image and close images will appear proportionately large for a dramatic effect