Olympus Zuiko 35-70mm f/4 Auto-Zoom - Olympus OM Mount

The Olympus Zuiko 35-70mm f/4 is a constant-aperture standard zoom lens designed for the OM film system. It offers a practical range from wide-angle to short telephoto, making it a convenient 'walk-around' lens. Despite the zoom design, it remains remarkably compact, matching the small form factor of OM-series SLR bodies. When purchasing a used model, it is important to check for zoom creep, where the barrel moves under its own weight. The constant f/4 aperture should be tested to ensure it remains consistent across the zoom range. SDS checks for internal haze and ensures the multi-coating is intact, as well as verifying that the focus ring operates without excessive play.