Stewhem, have you seen the focal reducers that shrink a 645 lens image onto a full frame camera? 0.7x focal length reduction, below is the one that adapts to RF (and I'm sure that mount adapters without optics are available, too)
https://www.bhphotovideo.com/c/prod...8JJkDSXqYxRWHRoC-zkQAvD_BwE&lsft=BI:514&smp=y
Brilliant. I hadn't seen that so thanks ahalpert. Of course, there's always the danger that older lenses, as great as they were, won't hold up quite as we'd hoped but certainly something I'd love to explore. Thanks again.
