The Tokina AT-X Pro SD 12-24mm F4 (IF) DX is a wide-angle lens designed for APS-C/DX format DSLRs only and is available for Canon and Nikon mounts. It has 18-36mm equivalent zoom range on a 35mm film camera and maintains a bright constant aperture of f/4.
The 12-24mm reveals an optical formula of 13 elements in 11 groups, which features 2 aspherical elements plus SD glass elements to combat aberrations. Chrome plated brass mount plate and all-metal zoom unit with advanced polycarbonate outer lens barrels make it a pleasure to carry.
This solid, well-built lens has excellent operational characteristics; the zoom and focus rings are impressively smooth. And one other outstanding feature is a one-touch focus clutch mechanism, which allows you to switch from auto to manual focus simply by pulling the focus ring towards the camera.
Tokina has recently updated this lens. The new ‘II’ model adds an autofocus motor for Nikon users (allowing AF on the D40 / D40X / D60 bodies). It also features improved coatings to reduce flare. So, these changes are relatively minor and Canon users will benefit only from the new coatings.
In the review by dpreview.com they state: “It’s simply a very sharp lens, especially wide open, delivering consistently good results at almost all settings; it also scores well with respect to its distortion and falloff characteristics. These characteristics, coupled with the constant F4 maximum aperture, make it much better suited to shooting interiors or in low light than similar lenses.”
They mention that only lateral chromatic aberration can also be problematic. And imaging performance at very close focus distances is not particularly good.
Tokina AT-X Pro SD 12-24mm F4 (IF) DX - Specifications:
- Focal Length: 12-24mm
- Focal Length Equivalent: 18-36mm (1.5x DX); 19-38mm (1.6x APS-C)
- Diagonal Angle of View (APS-C): 99º - 61º
- Maximum Aperture: F4
- Minimum Aperture: F22
- Lens Construction: 13 elements in 11 groups including SD glass elements and 2 aspherical elements
- 9 Diaphragm Blades
- Minimum Focus : 0.30m
- Maximum Magnification: 0.13x
- Micro AF Motor
- Internal Focus
- Filter thread: 77mm
- Supplied Accessories: Front and rear caps, Lens Hood BH-777
- Weight: 570 g (20.1 oz)
- Lens Mount: Canon EF, Nikon F
- Street price: $490 ($580 for ‘II’ version)
According to http://www.tokinalens.com.
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