Sorry, this isn't strictly Large Format, but I need the wisdom of the sages nevertheless.

I have a 1950's 6x9 folding camera. I rarely shoot wide images with it.

I'd like to be able to use it as a 6x9, 6x7, or 6x6, with the existing 105mm lens, to get more of a portrait length, as it were - and to get more exposures on a roll, accordingly.

  • How to make a removable mask ?

  • How to drill new holes in the back - above the other numbers which appear on the paper backing of the 120 film - and how to place a red window there ?

  • Has anyone done this sort of thing ? Would someone like to try ?