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This also brings the mirror down and cocks the lens shutter. The dark slide triggers a red LED, while the lack of film in the back causes an orange LED to light up.Р вЂќР вЂЎilm transport on the film backs is achieved through a single stroke of the transport lever.

Several LEDs at the bottom of the viewfinder are also used to communicate warnings. A warning will sound when the battery is low, when the shutter, which is built into the lens needs servicing or when the exposure time in the 'B' setting reaches 20 seconds (exposure in the 'B' setting will terminate after 30 seconds). The RZ67 bodies feature a built in beeper, which is used to sound warnings. In the other orientation the camera always fires at 1/400th of a second! It is important to note that the silver connector of the double cable release has to be threaded into the shutter button on the camera, while the black connector has to be threaded into the lenses socket. A double cable release is available to facilitate this operation through the depressing of a single button. The mirror can be locked up by threading a cable release into the cable release socket on the camera lens, then depressing the shutter button on the camera body and afterwards using the cable release on the lens.

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The original RZ67 featured a shutter speed dial with only full speeds from 4 seconds to 1/400th of a second.Р вЂќР вЂЎocusing is achieved through a rack and pinion driven bellows, which extends by 46 mm and allows very close focusing with wide angle and normal lenses. While the original body design concept remains almost unchanged to this date, the body has undergone some changes over time. Several viewfinders can be attached (see below). One 6V PX28 or 4LR44 battery in the camera body provides the power for operation and also for the optional AE finders. As the system is completely modular, the body needs to be connected to at least a lens and a back to function. It is covered with non-slip rubber, to which a dimple pattern is applied.

The RZ67 IID was sold coupled with Leaf Aptus II digital backs as the RZ22, RZ33 and RZ80 until 2010 since 2011 it has been listed as a 'legacy product' at the Mamiya Leaf site, but all models are also listed as compatible with current (as at 2015) Leaf Credo backs. The RZ models can mostly be found in studio settings as they are quite bulky due to the revolving back construction, but as they are now quite affordable in the used camera market, more of them are in the hands of enthusiasts, who also use them on location.

Lenses, viewfinders and backs can all be exchanged and full auto exposure is possible with some of the finder options. Being completely modular, the camera can be configured in many ways.

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The RZ models can use many of the RB components, such as lenses and backs, but with limitations, as the RB series cameras are completely mechanical, while the RZ lenses have Seiko #1 electronic shutters and electronic components are used throughout the camera.

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It was expected that the RZ series might replace the RB series, but this did not happen: at least until 2010, the RB67 Pro SD and the RZ67 Pro IID were both still being sold new. The name 'RZ' was derived from the RB67, where 'RB' stands for revolving back. The original RZ67 design was by Tsuneaki Munakata, who also designed the Mamiya ZM and Mamiya M645 Super. It consists of three models: (a) the original Mamiya RZ67, introduced in 1982 (b) the Mamiya RZ67 Pro II, introduced in 1995 and (c) the Mamiya RZ67 Pro IID, introduced in 2004. The Mamiya RZ67 is a series of medium format system cameras primarily designed for using 120/220 film.

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