The AT-X 14-20 F2 PRO DX accommodates all types of wide-angle needs from a dynamic, 21mm (35mm equivalent) wide angle of view with excellent depth of field to a 30mm angle of view ideal for quick snapshots. The AT-X 14-20 F2 PRO DX is designed to provide exceptional optical performance equal to three prime lenses: 21mm, 24mm and 28mm (35mm equivalent) in just one single zoom lens. The AT-X 14-20 F2 PRO DX is the realization of photographers' wish for the combination of the excellent optical quality of a prime lens with the convenience of a fast zoom lens. Designed to fully match the performance of high-end 24-30MP class APS-C crop sensor DSLR cameras, the super-bright f/2 aperture feels natural and confident in landscape, astrophotography, low light journalism, architecture, interior, documentary and street photography genres and even videography.