Shutter lag is the delay between pressing the shutter button and the camera actually capturing the image. Every camera has some amount of shutter lag, though it varies dramatically between camera types and models. Understanding and minimizing shutter lag is critical for action photography, candid moments, and any situation where timing matters.
What Causes Shutter Lag
When you press the shutter button, the camera must complete several tasks before the image is recorded: finalize autofocus, calculate exposure, set the aperture, charge the flash if needed, raise the mirror (on DSLRs), and open the shutter. Each step takes time. The autofocus step typically accounts for the largest portion of shutter lag, especially in low light or with slow lenses where the focus motor hunts for lock.
Shutter Lag by Camera Type
Professional DSLRs and mirrorless cameras have minimal shutter lag, often under 50 milliseconds with focus pre-locked. Consumer cameras and older compact cameras can have shutter lag of 200-500 milliseconds or more, which is long enough to miss a fleeting expression or a peak action moment. Smartphones have improved significantly but still tend to have more lag than dedicated cameras, particularly in low-light conditions where processing time increases.
How to Minimize Shutter Lag
The most effective technique is to pre-focus by half-pressing the shutter button before the decisive moment. This completes the autofocus and metering steps in advance, so when you fully press the button, the only remaining delay is the mechanical shutter actuation. Using back-button focus takes this further by completely separating the focus step from the shutter release.
Switching to manual focus eliminates autofocus lag entirely, which is useful for predictable situations like photographing a finish line or a specific spot where action will occur. Using continuous autofocus (AF-C) mode with tracking keeps the focus motor running continuously, reducing the lag at the moment of capture compared to single-shot focus that must acquire lock from scratch.
Shooting in burst mode helps compensate for remaining lag by capturing a rapid sequence of frames, increasing the probability that one frame captures the exact moment you intended. For the most responsive shooting experience, combine pre-focus techniques with a camera body known for minimal shutter lag.