Lens-fitted photo film unit with electronic flash device

A lens-fitted photo film unit, including a flash emitter for emitting flash light toward a photographic object in flash photography, a sensor for measuring light reflected by said object in said flash photography, and a flash amount control circuit for integration of a signal from said sensor, and for quenching flash emission of said flash emitter when a value of said integration comes up to a predetermined level, said lens-fitted photo film unit comprising:

• an externally operable mode selector for designating a selected one of a flash off-mode, a first flash mode, and a second flash mode, to disable said flash emitter in designating said flash off-mode, to effect said flash photography in designating said first or second flash mode, to determine a small aperture state in designating said first flash mode, and to determine a large aperture state in designating said second flash mode;
• an aperture stop device, including a stationary stop opening disposed in a photographic light path, a movable aperture stop plate shiftable into and out of said photographic light path, and a small-size stop-down opening formed in said movable aperture stop plate, wherein said movable aperture stop plate is associated with said mode selector, designates a selected one of said large and small aperture states, is disposed away from said photographic light path if said large aperture state is designated, and is disposed in said photographic light path if said small aperture state is designated;
• and
• a filter, associated with said mode selector, set in front of said sensor when said first flash mode is selected, and offset from said sensor when said second flash mode is selected.

A lens-fitted photo film unit, including a flash emitter for emitting flash light toward a photographic object in flash photography, a sensor for measuring light reflected by said object in said flash photography, and a flash amount control circuit for integration of a signal from said sensor, and for quenching flash emission of said flash emitter when a value of said integration comes up to a predetermined level, said lens-fitted photo film unit comprising:

• an externally operable mode selector for designating a selected one of a flash off-mode, a first flash mode, and a second flash mode, to disable said flash emitter in designating said flash off-mode, to effect said flash photography in designating said first or second flash mode, to determine a small aperture state in designating said first flash mode, and to determine a large aperture state in designating said second flash mode;
• an aperture stop device, including a stationary stop opening disposed in a photographic light path, a movable aperture stop plate shiftable into and out of said photographic light path, and a small-size stop-down opening formed in said movable aperture stop plate, wherein said movable aperture stop plate is associated with said mode selector, designates a selected one of said large and small aperture states, is set away from said photographic light path if said large aperture state is designated, and is set in said photographic light path if said small aperture state is designated;
• and
• a switch, changed over by said mode selector, connected in series with said sensor, turned off when said first flash mode is selected, and turned on when said second flash mode is selected.

A lens-fitted photo film unit including a flash emitter for emitting flash light toward a photographic object in flash photography, a flash amount control circuit for quenching flash emission of said flash emitter when a value of integration of light reflected by said object in said flash photography comes up to a predetermined level, said light being measured by a first sensor, and an aperture stop device for designating one of a large aperture state and a small aperture state, said lens-fitted photo film unit comprising:

• means for regulating operation of said flash amount control circuit in order to raise an amount of said flash light at a time of said flash photography when said small aperture state is designated;
• wherein said aperture stop device includes a stationary stop opening disposed in a photographic light path, a movable aperture stop plate shiftable into and out of said photographic light path, and a small-size stop-down opening formed in said movable aperture stop plate, wherein said movable aperture stop plate is set away from said photographic light path if said large aperture state is designated, and is set in said photographic light path if said small aperture state is designated;
• wherein said aperture stop device further includes:
• a second sensor for measuring brightness of said object;
• and
• an aperture stop plate drive unit for shifting said movable aperture stop plate according to said object brightness, so as to shift said movable aperture stop plate away from said photographic light path when said object brightness is low, and into said photographic light path when said object brightness is high;
• wherein said regulating means includes a switch, responsive to a signal from said aperture stop plate drive unit, for disabling said flash amount control circuit if said small aperture state is designated, and for enabling said flash amount control circuit if said large aperture state is designated.

A lens-fitted photo film unit including a flash emitter for emitting flash light toward a photographic object in flash photography, a flash amount control circuit for quenching flash emission of said flash emitter when a value of integration of light reflected by said object in said flash photography comes up to a predetermined level, said light being measured by a first sensor, and an aperture stop device for designating one of a large aperture state and a small aperture state, said lens-fitted photo film unit comprising:

• means for regulating operation of said flash amount control circuit in order to raise an amount of said flash light at a time of said flash photography when said small aperture state is designated;
• wherein said aperture stop device includes a stationary stop opening disposed in a photographic light path, a movable aperture stop plate shiftable into and out of said photographic light path, and a small-size stop-down opening formed in said movable aperture stop plate, wherein said movable aperture stop plate is set away from said photographic light path if said large aperture state is designated, and is set in said photographic light path if said small aperture state is designated;
• said lens-fitted photo film unit further comprising an externally operable mode selector for designating a selected one of a flash off-mode, a first flash mode, and a second flash mode, to disable said flash emitter in designating said flash off-mode, to enable said flash emitter in designating said first or second flash mode, to set said movable aperture stop plate in said photographic light path in designating said first flash mode, and to set said movable aperture stop plate away from said photographic light path in designating said second flash mode.