Shielding blades for TTL multi-pattern light adjustment preventing light leakage between curtains

A focal plane shutter of a camera for conducting measurement of shutter surface reflection, comprising:

• a plurality of shielding blades for covering said aperture in a developed position, said shielding blades each having at least one edge thereof overlapped by one of said shielding blades immediately adjacent thereto in said developed position, said overlapping edge having a predetermined minimum overlap width in a region opposed to said aperture, said shielding blades each having a lens-side surface thereof formed to be light reflective having a rate of diffused reflection, said rate of diffused reflection being set within a range according to said predetermined minimum overlap width such that no light leakage between said shielding blades occurs;
• wherein said rate of diffused reflection of said lens-side surface of said plurality of shielding blades is set to be within a range of 7 to 15% when said predetermined minimum overlap width in an aperture area is not less than 1.5 mm and not more than 2.5 mm, and
• said rate of diffused reflection of said lens-side surface of said plurality of shielding blades is set to be within a range of 15 to 22% when said predetermined minimum overlap width is not less than 2.6 mm and less than 4.5 mm.

A focal plane shutter of a camera for conducting measurement of shutter surface reflection, comprising:

• a plurality of shielding blades for covering said aperture in a developed position, said shielding blades each having at least one edge thereof overlapped by one of said shielding blades immediately adjacent thereto in said developed position, said overlapping edge having a predetermined minimum overlap width in a region opposed to said aperture, said shielding blades each having a lens-side surface thereof formed to be light reflective and having a rate of diffused reflection, said rate of diffused reflection being set within a range according to said predetermined minimum overlap width such that no light leakage between said shielding blades occurs;
• wherein said rate of diffused reflection of said lens-side surface of said plurality of shielding blades is within a range of 7 to 11%, and
• said predetermined minimum overlap width is not less than 1.5 mm and less than 2.6 mm.