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- Aperture Range: f/2.8 to f/22
- Two Aspherical Elements
- Two SD Low Dispersion Elements
- Multi-Coated Elements
- One-Touch Focus Clutch Mechanism
- Internal Focusing Design
- 9-Blade Diaphragm
Leaving the honourable AT-X abbreviation, the letter “i” was newly added. “i” stands for “interactive”, implying mutual communication between the photographer and the lens. This is our belief that this series will provide a tight bond between the photographer and the lens to capture in the image that the photographer sees around.
Exterior, specifications and performance of Tokina’s popular and well acknowledged so far AT-X PRO lenses are reconsidered with the contemporary cameras in mind and launched under the atx-i brand.
The Tokina atx-i 11-16mm F2.8 CF is designed as an ultra-wide-angle zoom lens for APS-C sensor DLSR cameras. It is the only f/2.8 fast ultra-wide-angle zoom lens for APS-C-sized DSLR cameras in the current market (according to an internal survey in September 2019).
The useful 11-16mm focal length is chosen to position this lens as an easily demanded gear after standard zoom lenses or initial wide-angle zoom lenses to start with.
A constant maximum aperture of f/2.8 throughout the entire zoom range is realized to achieve great results in low-light environments, for depth of field control and easy manual shooting, while maintaining a reasonable size and weight of the lens.
Optical Performance
To achieve an exceptional optical performance demanded ultra-wide-angle zoom lens in still and video shooting purposes, two aspherical glass elements and two Super-Low Dispersion glass elements were used to minimize distortion, and manage spherical aberration and astigmatism while achieving excellent edge-to-edge resolution and contrast of the entire image. Great efforts were made to control light fall-off at all focal lengths.
The anti-reflective multi-layer coating improves light transmission and minimizes reflections while water-repellent coating makes wiping and cleaning the surface of the front glass element easier.
Built Quality & Exterior Design
True to traditions, Tokina incorporated a lot of metal parts inside the lens for a reassuring built quality and long-term utilization in different shooting conditions.
The sophisticated exterior design is specifically developed to match the design of contemporary DSLR cameras.
Mechanics & Electronics
Precise attention was also paid to zoom and focus ring rotation which has a convenient amount with no play and made just enough tightly damped. The Tokina atx-i 11-16mm F2.8 CF for Nikon F mount incorporates an internal silent focusing motor in combination with a precise GMR sensor to allow the lens to AF on Nikon bodies that do not have an AF drive gear and motor.
The highly valued One-touch focus Clutch mechanism allows you to switch between autofocus and manual focus easily. The overall length of the Tokina atx-i 11-16mm F2.8 CF does not change when focusing and zooming thanks to the internal type of the focus construction
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