What is time lag between shutter releases?

The time lag between shutter release is the time between pressing the shutter button halfway to focus on the image and pressing it fully to begin the recording of the image. This delay or lag is the time it takes the camera to perform the different functions of taking a picture: focusing, calculating exposure, releasing the shutter, and recording the image to the memory card.

There are two primary specifications associated with shutter release time:

• Click-to-capture: The sum of all four elements above. It is the time from pressing the shutter release to the time the camera is ready to take the next picture (when not in a continuous shooting mode). This is often expressed in tenths of a second or can be as much as 1 second.
• Release lag: The time from when the shutter is fully depressed until the capture actually takes place. This is often expressed in milliseconds. A typical specification is 9 or 10 milliseconds.