The Bower 14mm f/2.8 Wide Angle Manual Focus Lens features two high-precision aspherical elements and two ED-glass elements. This results in better contrast and sharpness at the outer edges, and a reduction in chromatic aberrations that can sometimes be seen with high-resolution digital SLRs. This bright lens provides an ultra wide 89° angle view in digital SLR cameras with APS-C size sensors and a 114° angle of view when used with full frame DSLRs* so you can capture sweeping vistas, dramatic architectural compositions and panoramas. Additionally, its minimum focusing distance of only 11" (0.28 m) will allow you to move in close on your subjects to achieve amazing perspectives. With a fast f/2.8 aperture photographers can create dynamic photographs that take full advantage of the characteristics of the lens. * Note: Though this lens will cover the imaging sensor of a full-frame DSLR, it is better optimized for use with DSLRs containing smaller APS-C format sensors. As such you might notice softer focus and some light fall-off towards the edges of the frame when using a full-frame DSLR. If you do plan on using this lens with a full-frame DSLR we recommend you set the lens no wider (faster) than f/8 for optimum image quality.