Ttl Flash Mode With Measurement Pre-Flash Function (Olympus); P-Ttl Flash Mode (Pentax); Pre-Flash Ttl And Adi Metering (Sony) - Metz MECABLITZ 24 AF-1 C digital Bedienungsanleitung

5.6.4 TTL flash mode with measurement pre-flash
function (Olympus)
During the shot and before the actual exposure, one or more
pre-flashes are executed by the flash unit. The camera eva-
luates the measurement pre-flash and controls the light output
of the flash unit for the main flash.
The flash unit is set to this mode by the camera automatically.

5.6.5 P-TTL flash mode (Pentax)

With P-TTL flash mode a measuring pre-flash is fired before
the actual exposure. The camera evaluates the measurement
pre-flash and controls the light output for the main flash.
The flash unit is set to this mode by the camera automatically.

5.6.6 Pre-flash TTL and ADI metering (Sony)

These types of flash mode are used with Sony digital cameras
and adjusted on the camera.
During shooting, a measurement pre-flash is executed before
the actual exposure. The camera evaluates the measurement
pre-flash and controls the light output for the main flash. In
the case of ADI metering, additional distance data from the
lens is incorporated into the flash exposure process. The flash
unit automatically adapts itself to the mode selected on the
camera.
99