The Canon EF-mount atx-i 11-16mm f/2.8 CF from Tokina represents an enhancement to a highly regarded zoom lens, offering a versatile ultra-wide zoom ideal for capturing landscapes, architectural subjects, and interior scenes. Its constant maximum aperture of f/2.8 ensures consistent brightness across the entire zoom range, making it advantageous for shooting in available light. The lens's optical construction includes a combination of aspherical and low dispersion elements, effectively minimizing various aberrations to enhance sharpness and clarity. Additionally, each element is multi-coated to mitigate flare and ghosting, thereby improving contrast and color fidelity in bright or backlit environments. Furthermore, this lens is equipped with a One-Touch Focus Clutch Mechanism, allowing for swift transitions between autofocus and manual focus settings, while its internal focusing design contributes to a responsive focusing experience. Ultra-wide prime designed for APS-C-format Canon EF-mount cameras, this lens provides a 17.6-25.6mm equivalent focal length range. Bright constant f/2.8 maximum aperture affords consistent brightness throughout the zoom range and offers improved control over depth of field. Two aspherical elements, including one large-diameter molded element, help control spherical aberrations and distortions for sharper, more accurate rendering. Two SD low dispersion elements control color fringing and chromatic aberrations throughout the zoom range for greater clarity and color accuracy. Multi-coated elements suppress flare and ghosting for improved contrast and color accuracy when working in strong lighting conditions. Autofocus system uses an internal focusing design for quick and responsive performance. One-Touch Focus Clutch Mechanism avails quick switching between autofocus and manual focus settings by either pushing or pulling the focus ring. When set to manual, focus response is especially smooth and benefitted by hard stops at the ends of the focusing range.
