Horseman 985 'graflock' & Mamiya rb67 backs?

[Leon]

Have you used the Mamiya back yet? I'm curious if the film plane (spacing relative to the ground glass) is the same.

I've used them quite a lot, but only at relatively small apertures. They are sharp. I'll try some wide open to see if there is any discrepancy.

[Leon]

I've done some close up pics recently using the mamiya backs and a 150mm schneider symmar s. no focus issues at all. All is sharp where I want it to be:

[mgb74]

That's certainly good to know. And a great photograph.