DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a photosensitive silver halide emulsion wherein silver halide crystals are disposed in a synthetic water-soluble polymeric binder comprising a polymer having repeating units sented by the formula: I I i 1 2 CH C l 4 O-R3N\ I wherein: R is hydrogen, lower alkyl such as methyl or ethyl or halogen; R is hydrogen, lower alkyl,