flash exposure. An out of range warning was indicated by a flashing aperture setting, but,
unfortunately, this feature is available only on the EOS 600 / EOS 630 and EOS 10 / EOS 10 S
camera bodies.
Aperture setting
If the camera was set to FULL AUTO (green) or "P" mode, the A-TTL program selects an aperture
determined by the preflash metering, but also affected by the ambient light meter reading,
whichever was the smaller. In general, the program is biased towards maximizing Depth of Field,
rather than balancing background and foreground exposure. As a result, photographs shot in A-TTL
tend to be well focussed, but with dark backgrounds.
If the camera is set to Av, Tv, or M, the A-TTL program has no effect on aperture selection.
However, a preflash is still emitted from the Speedlite 430EZ that was intended for the out-of-range
function of the EOS 600 / 630 and EOS 10 / 10S camera bodies.
Exposure Compensation
Flash metering assumes an average reflectance for the scene. In cases where the scene is unusually
reflective or unusually dark, the flash exposure can be adjusted to suit the scene. Flash Exposure
Compensation (FEC) can be applied in increments of one third of one stop within a range of 3
stops.
To make the flash exposure brighter, push the "+" button on the Speedlite control panel until the
desired compensation is reached (range 0 to +3.0).
To make the flash exposure darker, push the "-" button on the Speedlite control panel until the
desired compensation is reached (range 0 to -3.0).
Accessories
Power
Accessory high capacity battery packs and high voltage power packs are available.
The 430EZ was the first Speedlite to have a high voltage port. It can take a Quantum Turbo, Canon
Transistor Pack or other high voltage battery, and recycle the flash in less than 1.5 seconds after a
full power manual pop. The six volt external batteries like the Quantum Battery 1+ do not recycle
the 430EZ any faster than a modern set of rechargeable AA's, which recharge the flash in about 5-6
seconds.
Connectors
The Speedlite 430EZ is normally directly mounted onto the hotshoe, but can also be used for off-
camera flash by using a Canon accessory Off-Camera Shoe Cord (OCSC or OCSC2), so long as the
camera is compatible with that accessory.
Alternatively, Canon had a system of connectors, cords, and distributors that carried
synchronization and TTL quenching signals over a maximum total of 10m /30ft of wiring between
the camera and up to four Speedlites. However, this system is very expensive and not very flexible,
in that lighting ratios between Speedlites or groups of Speedlites could not be set easily.
Another alternative is to use a wireless slave trigger. These range from simple low-cost hotshoe
optical slave triggers, to more complex remote-TTL units like the Ikelite Lite-Link (about
Darkest Darker Neutral Brighter Brightest
-3 -2 2/3 -2 1/3 -2 -1 2/3 -1 1/3 -1 - 2/3 - 1/3 0 + 1/3 + 2/3 +1 +1 1/3 +1 2/3 +2 +2 1/3 +2 2/3 +3
Pagina 7di 8EOS Documentation - 430EZ