Tokina has retained the outstanding performance that customers have come to expect from all the AT-X series lenses, however by using new manufacturing technology and materials, they have not only improved the barrel design for more comfortable handling but also reduced the overall weight of the lens, which has resulted in a lower cost AT-X lens to the end user.
The 28-70mm features a constant f2.8 aperture throughout the zoom range, which is excellent for low light photography at any focal length, while the wide aperture allows more light through for picture taking in difficult lighting situations.
The lens can easily be switched from auto focus to manual modes. While in manual focus, the lens has a damped action for smooth precise focus movement. Use of filters is convenient thanks to the non-rotating 77mm filter thread on the front lens barrel.
Specifications: Filter Size 77mm f/Stop Range 2.8-22 Minimum Focus Distance 2.3' (0.7 m) Magnification 1:5 Zoom/Focus Control Two-touch Angle of View 75 to 34 Degrees Groups/Elements 12/16 Tripod Collar No Length 4.3" (108.5mm) Maximum Diameter 3.3" (84mm) Weight 25.2 oz (715 g)