Shutter release (photography)
A trigger is a device on a camera , film or video camera that starts the exposure of a picture . Usually the shutter release is a button on the top right of the camera. It can be triggered mechanically , electrically or (rarely) pneumatically .
In addition to this main function, triggers often have additional tasks:
- In some older mechanical cameras with a central shutter, the shutter is cocked at the same time as the release process
- in mechanical cameras usually a fine thread is in a release button cable release appropriate to avoid vibrations;
- Here you could also screw on a self-timer
- With almost all electronically controlled cameras, exposure metering , focusing and image stabilization are activated by touching or lightly pressing the shutter release button
- For cameras with a measured value memory for exposure and focus, lightly pressing the shutter release causes these values to be retained and thus enables the image section to be changed afterwards
- Some cameras offer a connection or mounting option for a remote release , but many modern compact cameras lack this important connection and it seems to be reserved only for so-called professional cameras.
Motorized cameras and most digital cameras are also capable of taking multiple bursts with just one actuation .