(Edit: okay I was dictating with Siri, and that's what she said, ironically, but actually I meant"Pro-S model").
Mamiya designed the rz to replace the rb but people still clamored for the rb for some reason, so why not? All the rz 180s are tessars, btw. The 140 is a great lens, excellent for portraits too. It was also Annie Liebovitz's favorite lens.
The RB67 Pro-SD was introduced 8 years later in 1990 - it replaced the RB67 Pro-S which had been current for 17 years.
The RZ series may very well have been intended to eventually replace the RB series, but not immediately.
With the RZ series you lost functionality in some areas, while gaining in others. It certainly didn't make the RB series equipment second class.
the RB 67 pro had manual and motor backs the motor backs had a power pack that attached to base plate and they were 120/220 switchable and would work manually if the batteries failed. they work ok with grip and tripod options
you only pushed the big lever ie the back operated off the shutter double exp pin then you pushed the lever
the RB67 backs fit the other cams if you have the correct adapters eg the press camera
the foam is an irrelevant problem it lasts for 20 years you replace it... if you used the RB in cold you may need relubed sooner than refoam there is foam in the revolver as well also needs... autos need gas...
you need the manuals and you need to read...
Thanks for all the nice comments.
Which brings me to... the winter mid-mornings actually have quite deep hued skies - but how does one get that in Velvia on 120? ND filters? stop down much?
I didn't use a filter, and I've done no post production. I don't recall the sky being so deep blue. Velvia just does that.
It was about 11am, if I remember correctly. The velvia is quite flattering - I don't remember the sky being so blue.