Tamron 17-70mm

Praised by Experts

• ✓DPReview highlighted the lens as a “great travel‑zoom” with a generous 4.1× focal‑length range and lightweight construction, ideal for on‑the‑go shooting.
• ✓OpticalLimits praised the lens for “very homogenous, high image quality” and excellent center resolution across the zoom range, coupled with fast and silent RXD autofocus.
• ✓The inclusion of Tamron’s VC system was noted as a major advantage for non‑IBIS bodies, delivering up to five stops of stabilization.
• ✓Imaging Resource emphasized the comfortable ergonomics, stating the lens “feels good in hands” despite its compact size.

Criticized by Experts

• ✗Reviewers reported significant vignetting at f/2.8, exceeding 2 EV and requiring correction in post‑processing.
• ✗OpticalLimits observed a slight resolution drop at the extreme telephoto edge (70 mm), reducing corner sharpness compared with the center.
• ✗The by‑wire manual focus mechanism can unintentionally engage autofocus, which some reviewers found less intuitive for precise focusing.
• ✗Compared to rivals, the lens sacrifices a 1 mm wider angle (17 mm vs 16 mm), offering a marginally narrower field of view.