of the field of view appearing within the semitransparent region b i e the portion of the field of view situated within the photographic zone c simply has a different contrast than the portion of the field of view situated within the semitransparent region b also lines indicating the frame a boundary of the photometric zone d and reticle e are also clearly distinguishable in the field of view these advantages markedly improve ease of use of a photographic system comprising such a focusing glass compared with photographic systems comprising a prior art focusing glass the photographic zone can include any of various additional lines grids and or other alignment aids to facilitate use of the focusing screen as a photographic 34 finder 34 because the semitransparent region b as well as lines indicating the frame a boundary of the photometric zone d and reticle e can all be applied to the substrate using a single process such as vapor deposition a focusing glass according to the present invention does not have a higher cost than prior art focusing glasses the semitransparent film used to form the semitransparent region b preferably has a transmissivity within the range of 10 to 60 percent within this range the portion of the field of view within the semitransparent region b is readily distinguishable from the portion of the field of view within the photographic zone c and the field of view within the photographic zone c has satisfactory contrast if the transmissivity is less than 10 percent portions of the field of view within the semitransparent region b.