the idea behind Holga's for me really is the crappy vignetting - by projecting this onto a 4x5 holder, i was hoping to get to see either the full circle in all its dispersed glory (by keeping the distance between the rear lens element and the film plane the same as for a standard holga 6x6) - or probably more interesting is extending this distance to enlarge with image circle over the 4" axis at least and get much better close focus - a macro 4x5 Holga ...

just for the stupidity of it - and the learning.. would be nice to see a diagram of a Holga before I break one in half tho