The AT-X 11-20mm f/2.8 PRO DX Lens from Tokina offers a 16.5-30mm equivalent focal length and features a constant f/2.8 maximum aperture for maintained brightness throughout the zoom range. One P-MO hybrid aspherical element and two glass-molded aspherical elements work in tandem to minimize distortions and control various aberrations while three SD ultra-low dispersion elements reduce chromatic aberrations for increased clarity. The medium-torque focusing ring further benefits precise handling by allowing for refined control when manually focusing. Additionally, this lens sees the incorporation of a nine-blade diaphragm, which contributes to a pleasing out-of-focus quality when employing shallow depth of field shooting techniques. One P-MO hybrid aspherical element in the front group pairs with two glass-molded aspherical elements in the rear group to minimize distortions and correct aberrations. Additionally, three SD ultra-low dispersion elements are also incorporated within the lens design to further reduce chromatic aberrations for greater color accuracy and clarity.
Tokina AT-X 11-20mm F/2.8 PRO DX Specs