"The Rokinon 8mm f/3.5 Aspherical Fisheye Lens is the most affordable 8mm Fisheye Lens in the market. It features the widest field of view over any other 8mm fisheye lens, and its build quality and optical construction are superb. The ROKINON 8mm lens is designed for digital SLR cameras with APS-C image sensors. For these types of cameras, it provides full-frame coverage - which means that pictures will cover the entire frame. It is also compatible with cameras that have a full-frame sensor. For cameras with full-frame sensors, the lens will produce pictures with a semi-circular image and close images will appear proportionately large for a dramatic effect. The ROKINON 8mm lens creates imageswith an expanded and exaggerated perspective and an extremely wide 180deg. angle ofview. Note: Rounded image when used with full frame sensors|Ultra wide-angle 8mm fisheye lens with exaggerated perspective and approximately 180deg. angle of view, for dramatic effects|Ultra-wide 180deg. diagonal field-of-view for APS-C size image formats--will produce a rounded image that doesn't cover the entire frame when used with compatible full frame digital cameras|Lens is constructed with hybrid aspherical lenses for outstanding, sharply defined images|Lens features super multi-layer coating to reduce flare and ghost images|Lens has a minimum focusing distance of 12"" (30.48 cm) for enhanced close-up shots|Lens includes a built-in petal-type lens hood"