TheC330was released in 1969 as part of theMamiya Cseries of interchangeable lensmedium formatTLRcameras. It is an improved version of theMamiya C33. Similar to other models in the series, it supports interchangeable finder viewing system allowing options such as a chimney style magnifier, eye level prism and the traditionalwaist level finder. A new feature of the C330 is interchangeable focusing screens. There are six additional types of screens available. It can be changed by first removing the finder, extending the bellows and rotating the lever on the front of the screen holder. The lens parallax selector knob has been redesigned with more focal lengths which now include the 55mm, 65mm, and 250mm lenses. The film transport system is similar to the the previous C33 model, the C330 uses afilm advancecrank and supports cocking of the shutter automatically during the winding stage. The film counter is automatically adjusted for 120 or 220 film. There are twoshutter releases, one on the lower right hand side base of the body and another plastic downward firing one at the right side of the front standard.