Will an RZ67 6x6 back work on an RB67 Pro SD?

[Arthurwg]

I've been looking for a 6x6 back for my Pro SD but can't find any. But 6x6 backs for RZs seem plentiful. My question: Will the RZ 6x6 work on an RB?

 

[MattKing]

No. Here is a link to the Reznitsky Compatibility Chart:
http://www.reznitsky.info/Mamiya/Comchart.htm

 

[MattKing]

By the way, to the best of my knowledge, there never was a 6x6 back for the RB series.

 

[jwd722]

The Graflex RH/12 will work for 6x6 images. It has no interlocks but works just fine.
Biggest problem is that they seem to be a bit scarce.

 

[Alex Benjamin]

You need a G adaptor to use RB67 backs on a RZ67, there doesn't seem to be an adaptor to go the other way around.

I've been looking for a Graflex RH12 back in good condition for my RB67 but they are unobtainium these days.

 

[Alex Benjamin]

By the way, to the best of my knowledge, there never was a 6x6 back for the RB series.

The C330 was released in 1969 while the RB67 came out in 1970. Guess they felt providing a 6x6 option on the RB would have that model compete a little too much with the popular C series.

 

[MattKing]

The C330 was released in 1969 while the RB67 came out in 1970. Guess they felt providing a 6x6 option on the RB would have that model compete a little too much with the popular C series.

Or it may have been a desire to reinforce how different it was from the other SLR options. That big 6x7 negative and the revolutionary Rotating Back were really something at the time.

 

[Alex Benjamin]

Or it may have been a desire to reinforce how different it was from the other SLR options. That big 6x7 negative and the revolutionary Rotating Back were really something at the time.

Indeed. I'd be curious to see how it was advertised when it came out. If the rotating back was the main selling point, it would have made no sense to develop and offer a 6x6 back.

 

[Donald Qualls]

Mamiya did offer a 6x4.5 back for the RB67 -- not sure but it might have been built in 220 as well as 120. As noted, there's little sense in a 6x6 film holder for a rotating back when the rotating back was the big deal, especially since the Graflex backs for 2x3 would fit. I've got a Graflex 22 for mine -- knob wind, and as with the RH12, no interlocks, but it works as long as you don't forget to pull the dark slide and seemingly a little easier to find than an RH12. I've also got an RH20 (6x7 on 220) and a Graflex 23 in addition to my Mamiya 6x4.5, 6x7, and 6x7 on 220 backs. All of these work on my Century Graphic as well, though the dark slide interlock on the Mamiya backs requires using the override tabs to remove the dark slide.

 

[MattKing]

Mamiya did offer a 6x4.5 back for the RB67 -- not sure but it might have been built in 220 as well as 120.

It was offered for both 120 ad 220.

 

[rulnacco]

I've been looking for a 6x6 back for my Pro SD but can't find any. But 6x6 backs for RZs seem plentiful. My question: Will the RZ 6x6 work on an RB?

As others have pointed out, with the proper adapter, you can use an RB back (just like the RB lenses) on an RZ--but for both backs and lenses, you can't use RZ stuff on an RB.

The RZ advances the film as well as lowering the mirror and cocking the shutter when you push the lever on the side of the body after an exposure. So an RZ back on an RB, even if you could attach it (which so far as I know cannot be done in any way) would have no way to advance the film. Since the RB backs do have an advance lever, you can use them on an RZ even though the RZ body won't advance the film--you just have to do it like you would on the RB, push the body lever to lower the mirror/cock the shutter, use the advance lever on the back to go to the next frame.