Lens Lab
    Sigma AF 24-135 mm f/ 2.8-4.5 Aspherical IF
    Sigma AF 24-135 mm f/ 2.8-4.5 Aspherical IF

    Sigma AF 24-135 mm f/ 2.8-4.5 Aspherical IF

    24–135mm · f/2.8–4.5

    Overview

    The Sigma AF 24-135 mm f/2.8-4.5 Aspherical IF is a versatile full-frame zoom lens offering a useful 24-135mm range and a bright f/2.8 at the wide end. Optically, it suffers from softness wide-open, especially at f/2.8, making it suitable only for casual snapshots in low light. However, stopped down to f/8, results are acceptable. Build quality is decent, with smooth zoom travel, but not on par with premium lenses. It features internal focusing and a manual aperture ring. Best suited for budget-conscious users who prioritize range over sharpness, or for those who can stop down.