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Instead of adjusting flash level with each shot, TTL flash control can be locked for consistent results across a series of photographs.

Flash output is locked at the value metered for the most recent photo. An error message will be displayed if no previously metered value exists.
The camera emits a series of pre-flashes and locks flash output at the metered value.

To use TTL lock, assign [TTL-LOCK] to a camera control and then use the control to enable or disable TTL lock.

Flash compensation can be adjusted while TTL lock is in effect.