Program closure

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A program lock is a part of a camera that simplifies camera settings for the photographer .

When taking photographs, the exposure must be suitable for the sensitivity of the recording material. The shutter speed and aperture number must therefore be adjusted in inverse proportion if necessary, ie a longer shutter speed leads to a smaller aperture and vice versa.

The related decisions, e.g. B. A smaller aperture leads to a higher depth of field , a shorter shutter speed to a sharper image of moving objects, have overwhelmed some amateur photographers.

There were therefore simple cameras with program locks that were set using symbols:

• Head = portrait (medium shutter speed with medium aperture)
• Mountains = landscape shot (slower shutter speed with smaller aperture)
• Runners = sport (short shutter speed with aperture wider)

The program closure has been replaced by the automatic program in modern cameras .