Wide-angle zoom lens for APS-C DSLR cameras.
The Tokina AT-X 12-24mm f/4 Pro DX is a wide-angle zoom for APS-C sensor DSLRs, covering an equivalent 18–36mm range on Canon APS-C cameras. The DX designation in the canonical name typically refers to APS-C format (though DX is Nikon's specific APS-C designation — Canon APS-C lenses use EF-S). This lens is for Canon EF-S compatible bodies and covers the APS-C image circle.
12–24mm zoom range (18–36mm equivalent on APS-C), f/4 constant maximum aperture throughout zoom, APS-C image circle, Canon EF-S compatible mount (uses EF-S registration), Pro DX construction.
The constant f/4 aperture throughout the 12–24mm zoom range is a practical advantage for consistent exposure, particularly useful in low-light interior and architectural photography. The wide-angle range is effective for architectural, landscape, and documentary photography on APS-C Canon cameras. Not designed for full-frame Canon bodies.
Inspect for fungus, haze, and coating condition. Test at 12mm and 24mm extremes. Confirm EF-S compatible mount engagement. Check aperture blades for cleanliness. Note: the DX designation in the name typically refers to Nikon's APS-C format; this Canon-mount version is EF-S compatible.