Tokina AT-X 11-20mm f/2.8 PRO DX Lens for Canon EF
The AT-X 11-20mm f/2.8 PRO DX Lens from Tokina is a highly adaptable wide-angle zoom designed for Canon APS-C-format DSLRs. It provides a focal length equivalent to 17.5-32mm and features a constant maximum aperture of f/2.8, ensuring consistent brightness across the entire zoom range. The lens incorporates one P-MO hybrid aspherical element and two glass-molded aspherical elements, which work collaboratively to reduce distortions and manage various aberrations. Additionally, three SD ultra-low dispersion elements are included to minimize chromatic aberrations, enhancing overall clarity. A multi-layer lens coating has been applied to improve light transmission and color fidelity by reducing lens flare and ghosting. This ultra-wide zoom is ideal for a diverse range of shooting scenarios, offering a variety of wide-angle perspectives while ensuring uniform illumination in challenging lighting conditions.
To enhance usability, the lens features a one-touch focusing clutch that allows for swift transitions between autofocus and manual focus modes. Its internal focusing design ensures that the lens length remains constant during operation. The medium-torque focusing ring further aids in precise handling, providing refined control for manual focusing. Moreover, the lens is equipped with a nine-blade diaphragm, which enhances the aesthetic quality of out-of-focus areas when utilizing shallow depth of field techniques.
- Compatible with Canon APS-C-format DSLRs, this wide-angle zoom provides a 17.5-32mm equivalent focal length and features a constant f/2.8 maximum aperture for consistent low-light performance throughout the zoom range.
- 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.
- Multi-layer lens coatings reduce lens flare and ghosting for greater contrast and maintained color fidelity.
- A one-touch focus clutch mechanism permits seamless switching between autofocus and manual focusing positions, and the focusing ring features a moderate amount of torque for more fine-tuned control over the focusing position.
- An internal focusing mechanism maintains the overall lens form factor during operation.
- A nine-blade diaphragm contributes to a smooth out-of-focus quality, which benefits the use of shallow depth of field techniques.
