Ultra Wide-Angle Zoom. The Tokina atx-i 11-16mm f/2.8 CF Lens for Canon EF offers APS-C shooters a focal length equivalent to 17.6 to 25.6mm after sensor crop. This produces a field of view of 104° to 82°, making it a great choice for landscapes, cityscapes, architecture, and interiors.

Fast Aperture. The f/2.8 constant aperture throughout the zoom range gives you flexibility in low-light shooting. It also enables better subject/background separation than the slower variable-aperture ultra-wides.

High-Quality Optics. The 11-16mm f/2.8 CF’s eleven-group/thirteen-element optical formula uses two SD low-dispersion elements and two aspherical elements to produce extremely sharp, high-contrast, and color-accurate images while combating fringing, aberrations, and distortions.

Fast Focusing. This lens’s autofocus system boasts an internal-focusing design that makes for quick autofocus performance, while the One-Touch Focus Clutch Mechanism quickly switches between autofocus and manual-focus modes with a simple slide of the focusing ring.