Lens Lab
    Mamiya-Sekor Zoom CS 45-90 mm f/ 3.5 Auto
    Mamiya-Sekor Zoom CS 45-90 mm f/ 3.5 Auto

    Mamiya-Sekor Zoom CS 45-90 mm f/ 3.5 Auto

    45–90mm · f/3.5

    Overview

    The Mamiya-Sekor Zoom CS 45-90 mm f/3.5 Auto is an extremely rare lens for the Mamiya NC-1000, prized for excellent optical quality. However, it suffers from a notorious design flaw: an internal rubber bellows that decays into a tar-like mass, jamming the zoom mechanism. Cleaning this mess is possible but time-consuming; once restored, the lens performs well. Its complex four-group zoom design and high cost limited sales, making it a collector's item for enthusiasts willing to repair it.