Through-the-lens metering

As Through the Lens ( TTL;. Engl for " through the lens [ through ]") is used in photography all through the lens performance measuring and control operations.

A distinction is mainly between

  • TTL exposure metering as well as internal measurement
  • TTL flash metering, and flash metering
  • TTL pre-flash
  • TTL sharpness measurement
  • TTL autofocus
  • TTL contrast detection
Metering mode
774197
de