Light-sensitive silver halide emulsions

A light-sensitive silver iodobromide emulsion containing core/shell silver iodobromide grains having a core substantially comprising silver iodobromide containing at least about 5 mol% of silver iodide and a shell selected from the group consisting of (a) a shell comprising silver iodobromide having a lower silver iodide content than that of the silver iodobromide of the core and (b) a shell comprising silver bromide, wherein the relative standard deviation of the silver iodide content of the individual grains of said silver halide emulsion is lower than about 20%, and wherein at least about 95% (by number) of the grains have a size within about .+-.40% of the mean grain size.