Well-suited to wildlife, sports, and portraits, it scales up to 105–300mm on most DSLRs. Autofocus is fast and quiet, and the build robust. Sorry, though—no extra moisture or dust resistance.
Standout Spec: Compatibility with Sigma teleconverters for up to twice the reach.
Lens Test: Sigma 70-200mm f/2.8 APO EX DG HSM AF