Hi ! I wonder why there is only Kodak T-grain film in 400 ISO speed available in 4x5 size. Large format film can accommodate larger grain so 400 ISO speed is very good in that size. We are not, as smaller format users are, forced to use the slow fine grained films. Add to this the fact that we use "slow" lenses, often closed as much as we can to gain that extra mm of deep of field. So I wonder why one can use HP5 Plus but not Delta 400 ? Mr Galley, a good reason ?