55–200mm · f/4–5.6
The Sigma AF 55-200mm f/4-5.6 HSM DC is an affordable telephoto zoom for APS-C DSLRs, offering compact build (315g) and a metal mount. Optical strengths include low chromatic aberrations and good flare control, but resolution is poor at wide apertures and best at f/11-16; it performs better at the wide end than telephoto. Build quality is decent for its class, though the zoom ring is stiff and the focus ring loose; AF is slow and noisy without HSM. It suits budget-conscious beginners or as a starter telephoto lens.