4x5 backs on an RB67 (for the RH50)

[Monday317]

I have 10mm to play with, so 3D printing is a viable option. I can also adjust the screws on the back by tiny amounts in order to get the focus exactly right, so I’m not super worried.

If you can get a ground glass screen to fit in some way, your focus issues are history.

 

[Donald Qualls]

If you can get a ground glass screen to fit in some way, your focus issues are history.

Well, unless you want to focus on the horizon. If the film/ground glass are further away than the original film plane, you'll be locked into focusing closer -- and if they're much further away, you might be stuck with macro images...

 

[MCB18]

I did get a prototype printed, and although it doesn’t quite fit due to me missing a pair of slight notches on the rb67’s mating surface that force the correct orientation, it does bolt onto the RH50 perfectly. I’ll see if I can get the revised prototype printed and hopefully I’ll have an adapter that works perfectly! Still need to get the light foam and screws for it, but hopefully those aren’t too terrible to find.

 

[Monday317]

Well, unless you want to focus on the horizon. If the film/ground glass are further away than the original film plane, you'll be locked into focusing closer -- and if they're much further away, you might be stuck with macro images...

Party pooper. Took all the fun out of the thing; you’re absolutely correct of course.

 

[Monday317]

I did get a prototype printed, and although it doesn’t quite fit due to me missing a pair of slight notches on the rb67’s mating surface that force the correct orientation, it does bolt onto the RH50 perfectly. I’ll see if I can get the revised prototype printed and hopefully I’ll have an adapter that works perfectly! Still need to get the light foam and screws for it, but hopefully those aren’t too terrible to find.

We will pray for you.

 

[ags2mikon]

@MCB18 How does that latch to the body? I don't have my RB67 in front of me, so do you have to remove the studs from a P adapter? That looks nice.

 

[Nokton48]

You could make it short a teeny bit, then make shims out of black Illustration Paper. I get mine from Dick Blick. You would need loupe and glass to set infinity properly shimmed. Trial and Error and Trial. Myself I have four RH50's and they are quite useable and useful.

Good Luck with your project. That looks VERY cool.

 

[joho]

as for the RB67_PRO-II Are the lens inter-changable with RZ67 and so are the backs????

 

[MattKing]

RB67 lenses are mostly usable on the RZ67.
RZ67 lenses are not usable on the RB67.
The backs are not interchangeable.
The Reznitsky Compatibility Chart is your friend:
https://www.reznitsky.info/Mamiya/Comchart.htm

 

[joho]

thank you for the link !!!