Mamiya C330 Professional

The Mamiya C330 professional f is a traditional film twin-lens reflex camera introduced in the 1970s for the professional and advanced amateur photography markets. This model was 340 grams lighter than the previous model C33, which weighed 2040 grams (with 80 mm lens). The later C330f is an improvement on the C330 and was succeeded by the C330S with further improvements.
Uses 120 and 220 rollfilms
With the rack and pinion bellows type focusing system, close-up photography is possible without attachments.
Has a self-cocking one action 360° winding crank with a double exposure prevention device. Double exposure is also possible. The straight filmroll path has no right-angle turn and guarantees an absolutely flat film.
The backplate is changeable for single-exposure photography
Dimensions: 122 (w) × 168 (h) × 114 (d)
Weight: 1.7 kg (with standard lens)

The Mamiya C-series cameras are one of the very few twin-lens reflex cameras with interchangeable lenses, along with the Koni-Omegaflex and Zeiss Contaflex.

Every lens has its own Seikosha (chrome) or Seiko (black) leaf shutter system with a shutter speed of B, 1' -1/500 sec, X or M flash synchronisation and bulb mode. The C330 camera has two shutter release buttons, an automatic conversion film counter 120/220, an indicator of the film in use, a removable back cover, a hexagonal distance scale rod for the different lenses, automatic parallax compensation, an automatic exposure factor indicator and interchangeable focusing screens. (Wikipedia)