What type of camera setting is least effective for fast-moving subjects?

The least effective camera setting for capturing fast-moving subjects is the automatic mode. This mode typically relies on the camera's algorithms to determine the appropriate shutter speed, aperture, and ISO settings without user input. While automatic settings can perform well in many situations, they may not adapt quickly enough to varying speeds and directions of fast-moving subjects.

For example, when photographing a sports event or wildlife in motion, the photographer often needs to prioritize a fast shutter speed to freeze the action. Automatic mode may select a slower shutter speed than necessary, resulting in motion blur. In contrast, settings such as shutter priority allow the photographer to specify the shutter speed directly while the camera takes care of the aperture, which can be particularly advantageous in dynamic shooting situations. Using manual or program modes can also offer more control than automatic, enabling adjustments based on the specific conditions being encountered. Therefore, automatic mode is generally the least effective choice for fast-moving subjects.