Lens Lab
    SIGMA AF 50-500 mm f/ 4-6.3 APO HSM EX DG RF
    SIGMA AF 50-500 mm f/ 4-6.3 APO HSM EX DG RF

    SIGMA AF 50-500 mm f/ 4-6.3 APO HSM EX DG RF

    50–500mm · f/4–6.3

    Overview

    The Sigma AF 50-500mm f/4-6.3 APO HSM EX DG RF, nicknamed 'Bigma', offers an unprecedented 10x zoom range from 50mm to 500mm, making it highly versatile for wildlife and general telephoto use. Optically, it delivers decent sharpness but image quality degrades quickly at longer focal lengths, with the 500mm setting effectively closer to 450-470mm. Chromatic aberration is well controlled thanks to APO elements. Build quality is good for its EX line, with smooth rings and a solid tripod collar, but the lens is heavy (4.1 lbs) and extends significantly. It suits amateur wildlife photographers seeking extreme flexibility on a budget, but not those demanding pro-level sharpness.