During the Carnival in Venice I used Rollei's SuperPan 200 as 35mm, as 6x6 and 6x9 in my two folding cameras.
I developed the Superpan 200 in Rodinal 1+150 1h30, full stand after initial 20" agitation.
The combination appears to work very well, I got full-range negatives both sun situation, as complete overcast.
An example showing the excellent bokeh of the mythical Heliar, wide open:
You can buy a (at your liking framed) print, poster or home decor, even as phone case on Fine Art America.