Tokina's full-frame wide-angle zoom — the AT-X 20-35mm f/2.8 Pro for Canon EF mount.
The Tokina AT-X 20-35mm f/2.8 AF Pro is a full-frame wide-angle zoom with a constant f/2.8 aperture for Canon EF mount. Covering the popular wide-angle range with a fast constant aperture, it competed against the Canon EF 17-35mm f/2.8L at a significantly lower price. Tokina's AT-X Pro designation indicates their professional build tier.
Optical performance is decent. Sharpness is good in the centre from f/2.8 with corners improving by f/4. The constant f/2.8 aperture provides consistent exposure and DOF throughout the range. Tokina's one-touch focus clutch enables instant AF/MF switching. Build quality features the solid metal construction Tokina is known for.
Canon EF mount. Filter thread is 77mm. Weight is approximately 580 grams — moderate for a fast wide-angle zoom. Build quality is solid with Tokina's characteristic metal barrel. No image stabilisation. The 20-35mm range is useful but slightly narrower than the wider 17-35mm competitors. Available in Nikon F mount as well.
Available on the used market at low prices — superseded by modern alternatives. Check the focus clutch and AF accuracy. The constant f/2.8 at this price is the main attraction. Best suited to budget-conscious shooters who want a fast full-frame wide-angle zoom. Modern alternatives from Sigma and Tamron are significantly better optically.