Besides focusing, half-pressing the shutter button also does what?

• A. Turns on flash
• B. Measures the light
• C. Adjusts white balance
• D. Starts video recording

Answer: (B)

When you press the shutter halfway, the camera engages its autofocus and simultaneously checks the scene’s brightness with its light meter to determine the proper exposure. This metering guides the camera in choosing exposure settings (like aperture and shutter speed) so the final image isn’t too dark or too bright. The other actions—turning on the flash, adjusting white balance, or starting video—are controlled separately and don’t automatically happen from a half-press.