The Mamiya C330 is a 6x6cm medium format twin-lens reflex camera, representing the professional tier of Mamiya's interchangeable-lens TLR system. Unlike fixed-lens TLRs such as the Rolleiflex, the C330 accepts interchangeable lens pairs, making it a highly flexible medium format system for studio and field use. The C330 uses paired taking and viewing lenses that are changed together as a unit — a design unique to the Mamiya C series among TLR cameras. This allows the system to cover a range of focal lengths from wide-angle to telephoto while retaining the waist-level TLR viewing experience. The DS (Dual Super) designation indicates Mamiya's updated multi-coating applied to both taking and viewing lenses. The Blue Dot marking identifies lenses with improved anti-reflection coating, offer.