Light beams, reflected on an outer surface around a lens barrel which may
be incident to a light receptor, are intercepted at a maximum by a camera
photometer embodying a light shield mask having a wide range light shield
formed to intercept light over a wider range at a part near a lens barrel
when the light receptor of an AE device is arranged in the vicinity of the
lens barrel. The light shield mask is an elastic thin member stuck onto
the incidence surface of the condenser lens of the photometer and has an
opening formed to be partly like a circular arc but along a chord of the
circular arc elsewhere to form a wide range light shield outside the
chord.
