MF Macro Lenses on LF?

[Mark Sawyer]

The issue you would encounter is the actual coverage of the lens in question, not the theoretical coverage of a particular design.

That's because the lens mount and focusing helicoid will limit the IC.
There was no need to cover more than the MF image size.

- Leigh

If the lens covers 2 1/4 x 2 3/4 inches (6x7 cm) at infinity, it will cover twice that at 1:1, so 4 1/5 x 5 1/2, and correspondingly larger at even higher magnifications. The barrel design won't change the cone of illumination angle as the cone gets longer, if that makes sense. True for all designs.

[Tin Can]

I did not read all your links, but I remembered being confused by my link 7 years ago, when I bought a NOS RB 67 SD system. Brand new was going for nothing. Beautiful lenses.

Thanks Dan!

Randy, when Mamiya says "covered" when describing lenses for their RB67 and RZ67 systems they mean "the size of the subject at the lens' close focusing distance."

I say this very clearly in my list of links.

[Tin Can]

That does make sense.

If the lens covers 2 1/4 x 2 3/4 inches (6x7 cm) at infinity, it will cover twice that at 1:1, so 4 1/5 x 5 1/2, and correspondingly larger at even higher magnifications. The barrel design won't change the cone of illumination angle as the cone gets longer, if that makes sense. True for all designs.