Lens Lab
    Tamron SP 200-500 mm f/ 5.6 Adaptall-2 model 31A
    Tamron SP 200-500 mm f/ 5.6 Adaptall-2 model 31A

    Tamron SP 200-500 mm f/ 5.6 Adaptall-2 model 31A

    200–500mm · f/5.6

    Overview

    The Tamron SP 200-500 mm f/5.6 Adaptall-2 model 31A is a versatile long zoom with consistent sharpness across apertures, comparable to prime telephotos at 300mm and 500mm (cooltouch). Notable weaknesses include noticeable purple chromatic aberration up to f/11, though easily correctable in post-processing, and somewhat low contrast at wider apertures (cooltouch). Build quality is typical for its era; users report dust and fogging issues in used copies (tighelander). It suits photographers needing flexible reach for sports or wildlife on a budget, provided they are willing to manage CA and contrast (Anonymous).