george
--- Handmade Photographic Images http://www2.ari.net/glsmyth/On Thu, 9 Oct 1997, George Petrov wrote:
> I'm planning to start 9x12cm sheet film photography. > Am I right to use formula for hole diameter D: > SQRT(Focal lenght) > D= -------------------- [mm] > 44 > > Since I have enough quantity of b/w 9x12 sheet film, film holders, > cassetes, Jobo tank for development of 6 pieces at time, home made > enlargerer; can someone recomend me a combination of hole diameter > and focal lenght for this format. I am esspecialy interested is > there combination that can allow enlargment and by what ratio?