hi. i found these 7 × 7 plastic slide mounts that hold a 35mm slide with a frame that looks to be about 24 x 54mm. I am trying to figure out what camera shoots this ratio. Any ideas?
I have the 135 Wide film back for my Bronica ETRSi .
Slides from that would fit in them .
I've. It measured the opening , but I think it would be about right .