Is 6x6 120 film back for Mamiya RZ67 different from 6x7 120 film back?

<p>I recently purchased a Mamiya RZ67 camera with 120 film back. I don't know if it is 6x6 format or 6x7 format. How will I identify this? If they are same then how do we change from one format to another (say 6x6 to 6x7 or vice versa). Please help!</p>

<p>RZ 67 Pro, 6 X 6 roll film back:<br /> http://www.usedcameraexchange.com/HAM3581/1.JPG</p>

<p>The 6 X 6 back for the RZ is the only back in the RZ line that accepts either 120 or 220 film via an adjustable pressure plate.<br /> These 6 X 6 backs were only produced during the early days of the original RZ Pro production run. <br /> The backs were mostly for shooting slide film for those that wanted to project the images. 6 X 7 slide projectors were/are very rare and expensive, but 6 X 6 projectors are more numerous.</p>

<p>Any back in the RZ line, other than 6 X 7, will have 6 X 6 or 645 printed on the top, like the sample link above.<br /> If you wish to shoot multiple frame sizes on the RZ, you have to purchase multiple backs, each back is dedicated to only one frame size; ie...645, 6 X 6, or 6X 7.<br /> In 6 X 7, there are dedicated backs for 120 film, and separate backs dedicated to 220 film.<br>

However, you can change from 120 to 220 by changing the film insert.<br /> Please remember that only original RZ Pro inserts fit inside an original RZ Pro housing.<br /> RZ Pro II inserts only fit inside Pro II housings. The inserts and/or housings can not be inter mixed between Pro and Pro II.<br /> Also, each size insert must go with the appropriate size housing;<br /> ie...645 insert w/645 housing, 6 X 7 insert w/ 6 X 7 housing, etc...</p>

<p>Marc</p>

<p>I just see Mamiya RZ67 Professional II and below to it is 120.... so this is 6x7 format 120 film back it seems :D Thanks for your quick response!!!</p>

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<p>.... so this is 6x7 format 120 film back it seems...</p>

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<p>Correct!</p>

<p>Mamiya also made a 6X8 film back for use with Arca Swiss cameras.<br>

(It said, "RB" on it, and I'm not sure if they still make it.)</p>