Lens Lab
    Sigma Zoom AF 28-70 mm f/ 3.5-4.5
    Sigma Zoom AF 28-70 mm f/ 3.5-4.5

    Sigma Zoom AF 28-70 mm f/ 3.5-4.5

    28–70mm · f/3.5–4.5

    Overview

    The Sigma Zoom AF 28-70 mm f/3.5-4.5 is an inexpensive, compact zoom lens suited for film or low-resolution digital cameras. Optical performance is modest: sharpness may suffice for 6-10MP sensors but struggles with demanding 24MP sensors. Build quality is basic, typical of a budget lens. It may offer decent results for landscape at 28mm on film and can double as a soft portrait lens, but expectations should be low given its typical $20-30 price.