Has anyone here constructed a foamboard pinhole camera à la Stanford (http://pinhole.stanford.edu/foamcore.html) ? I've long wanted to do some 10x8 pinhole work, and I've finally acquired a couple of 10x8 backs at not-too-excessive a price, so I now need to make a camera on which to mount them. I have nothing remotely approaching a workshop, so am limited to what I can build on my kitchen worktop with the most basic tools - in essence, an Xacto knife and a steel ruler. The Stanford approach has the merits of requiring only the tools I have and inexpensive materials, plus it has step-by-step instructions that it appears even an oaf such as myself could follow. SO ... the question is simply, is there any reason why I should not be able to simply scale up the Stanford dimensions (for a 5x4 camera) up by a factor of 2 to build myself a 10x8?