Well, in the Windoze environment, there is
Pinhole Designer which has all sorts of handy calculations. I think in theory the field of view approaches 180º, but the light falls off and, as seen in CuS' photo on Flickr, the ultimate coverage can wind up being limited by the mechanics surrounding the pinhole. My
first body cap adapter for the Bronica suffered serious vignetting, after which I did what I should have done in the first place and plotted a scale drawing of all the parts and spacings to work out larger holes for some of the components.
Rev 2 was way better, even though the pinhole and the pinhole-to-film spacing didn't change. As a practical design, I would guess a 90º angle of view (film to pinhole distance approximately equal half the diagonal of the film frame) should be easily possible, and maybe out to 120º or so. But it can get tricky, as even the thickness of a foamcore or plywood mounting board could cause vignetting at some point.
I believe a knife-edge pinhole is needed for very wide angles too, or at least a very thin foil. Otherwise the light fall-off will be more severe.
The next step is then to work out an optimum pinhole diameter for the given spacing. Using a press camera was cool because the film-to-pinhole distance could be varied over a large range with one pinhole installed.
I wouldn't say there's a hyperfocal distance, but there is an interesting phenomenon observed by several of us last year. As you look further into the background, there seems to be softer focus. This is apparently caused by resolution required to render the detail reaching a point where it is greater than the pinhole can render, not really a focus issue.
DaveT
