Kodak DCS500 manual What is TTL?

What is TTL?

TTL (Through-The-Lens) is the standard flash exposure control mode for Speedlites 480EG, 200E, 160E and Macro Ring Lite ML-3 when used with the DCS 500 Series camera. Additionally, TTL is available with Speedlite 540EZ in all camera exposure modes except for direct flash in Program mode, as shown in the following table. TTL is identical to A-TTL in almost every way, except there is no preflash. When the camera is set to Program mode, TTL flash sets an aperture based on a program line that responds to the ambient light level.

The availability of A-TTL or TTL depends on the user’s choice of Speedlite, camera exposure mode, and whether or not the Speedlite is set for direct flash as follows:

Availability of A-TTL and TTL according to Speedlite with DCS 500 Series camera

Camera Exposure Mode -->		Program	Shutter-	Aperture-	Manual
Speedlite	Flash Mode		priority	priority
540EZ	Direct Flash	A-TTL	TTL	TTL	TTL
	Bounce Flash	TTL	TTL	TTL	TTL
430EZ*	Direct Flash	A-TTL	A-TTL	A-TTL	TTL
	Bounce Flash	A-TTL	A-TTL	A-TTL	TTL
420EZ*	Direct Flash	A-TTL	A-TTL	A-TTL	TTL
	Bounce Flash	A-TTL	A-TTL	A-TTL	TTL
300EZ*	Direct Flash	A-TTL	A-TTL	A-TTL	TTL
480EG	Direct Flash	TTL	TTL	TTL	TTL
	Bounce Flash	TTL	TTL	TTL	TTL
200E	Direct Flash	TTL	TTL	TTL	TTL
160E*	Direct Flash	TTL	TTL	TTL	TTL
ML-3	Direct Flash	TTL	TTL	TTL	TTL
300TL**	Direct Flash	TTL	TTL	TTL	TTL
	Bounce Flash	TTL	TTL	TTL	TTL

*Indicates discontinued product as of 1/98.

**When using Speedlite 300TL, set the Flash Mode button to a position other than MHi or MLo for TTL automatic flash exposure.

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Exposure

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