Device for preventing erroneous handling of a camera

A dual preference camera capable of effecting shutter time priority and aperture value priority comprising:

• a. shutter means;
• b. shutter control means functionally engaged with said shutter means;
• c. shutter time setting input means functionally engageable with said shutter control means for controlling said shutter means during an opening time of said shutter means corresponding to a set value, said shutter time setting input means having a first operating mode for manual adjustment of the shutter time and a second operating mode for automatic adjustment of the shutter time;
• d. aperture means;
• e. aperture control means functionally engageable with said aperture means;
• f. aperture value setting input means, functionally engageable with said aperture control means for controlling said aperture means in correspondence with an aperture set value, said aperture value setting input means having a first operating mode for manual adjustment of the aperture value and a second operating mode for automatic adjustment of the aperture value;
• g. exposure control means to effect a desired exposure time including light measuring means for measuring object brightness, said exposure control means being operatively connected to said shutter control means and said aperture control means to control said shutter means and said aperture means in accordance with signals from said shutter time setting input means, said aperture value setting input means and said light measuring means;
• and
• h. means for preventing erroneous handling of said camera, said erroneous handling preventing means being connected to said shutter time setting input means and said aperture value setting input means so that only when both said means are set in the automatic adjustment modes, the actuation of the shutter release of the camera is prevented.