Besides what I might find in this forum can any one recommend a forum that would be good to follow? I've got some Mamiya RB and RZ equipment and I'd like to learn a bit more about them.

Thanks.

We have some here with experience in various film formats, ask and you might get you questions answered here.  A couple of sites I'm aware of that have generic mf threads:

APUG, merged with a couple other sites and is now PHOTRIO.  They have a medium format equipment section.  I haven't been there in years, so I don't know how good the forum is these days.  https://www.photrio.com/forum/forums/medium-format-cameras-and-accessories.72/

The Luminous Landscape has a dedicated medium format thread.  http://forum.luminous-landscape.com/index.php?board=16.0

Good. Thanks and I'll have a look at those sites.

No particular questions really. Just sort of learning I guess. I've inherited quite a lot of camera gear that my brother left when he passed a few years ago. Among them was a steamer trunk full of Mamiya Sekor equipment.  So far I see a RB65 and RZ65 body. Lots of other stuff but I haven't gotten any further that just opening the trunk.

I was in the pro selling biz from 1978~2012.
Sold a few RB’s and RZ’s.

RB was first gen then RB Pro S then RZ came out along side the RB Pro S.

RB is all manual, cock the body lever which resets the mirror and cocks the shutter in the lens. The Pro S added some features to the body and magazines.

The RZ again is a manual camera but there were electronic interfaces with the magazines, viewfinders, lenses, winders, shutter release and other options. The RZ also when cocked-rest the body, cocked the shutter and advanced the film. If there are any RZ’s pull the batteries out before they corrode and leak.

120 film magazines were 10 exposures and 220 was 20 exposures in the 6cmx7cm format more. 15 & 30 for 6x4.5 format. Plus Polaroid backs and later digital backs for the RZ. For the school shooters ( it was a term back then that was no where near what that brings up today ) there were long roll backs that would give you about 200 pictures in 645 format.

KEH Camera Brookers (across the street from Glock ) sells used photo gear and might be a source of manuals and accessories.

ETA “RZ will fit RB but RB won’t fit RZ” as far as lenses and viewfinders go. Film backs are unique to each. Again IIRC.

PM me if I can answer anything.

7mm

I love my RB67 Pro-S, I have the 90mm and the 180mm.
If I ever win the lotto, I'm getting a PhaseOne medium format digital camera.

The Pro SD was the final version of the RB67.

Info here
http://www.mamiyaleaf.com/legacy_RB67.asp

and here

https://rb67.helluin.org

dpreview is like the ARF of camera forums.