shutter release 
noun
The button on a camera that is pressed to make the shutter open.Camera absent-mindedly in hand, she accidentally pressed the shutter release....
- With most cameras the correct-focus indicator light will blink rapidly and the shutter release won't fire.
- It will now hold that focus until you either fully depress the shutter release, or you take your finger off the button.
- water jet
- water-jet propeller
- water-jet propulsion
- water-jet pump
- water joint
- water jump
- water jumper
- waterkeeper
- waterkeeping
- water knot
- water lade
- waterlade
- water-laid
- waterland
- Waterlander
- Waterlandian
- water lane
- water language
- water-lapper
- waterlead
- waterleader
- waterleaf
- water leat
- waterleave
- water leech