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Power switch Description The Speedlite 430EZ was introduced in 1989, two years after the introduction of the first EOS camera and the first Speedlite. This battery-operated, hotshoe-mounted flash unit is dedicated to the EOS system, and is a direct replacement for the Speedlite 420EZ. The feature set was updated to coincide with the launch of the EOS 600 / EOS 630 camera body.
EOS Documentation - 430EZ Pagina 2 di 8 General Operation Power Select a fresh set of 4 AA cells of the same type, such as NiMH, NiCd, or alkaline. Slide back the non-removable cover, and swing it up on its hinge to expose the battery compartment. Check the polarity diagram, then insert the AA cells.
EOS Documentation - 430EZ Pagina 3 di 8 Panel backlight If the panel is too dark to read, push and release the LIGHT/MULTI(HZ) button to activate the backlight. The backlight will automatically extinguish after 8 seconds. Flash Test Switch your flash ON and wait for the flash to charge. When the READY light glows, push the test button on the flash.
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EOS Documentation - 430EZ Pagina 4 di 8 "MODE" button to cycle through the choices until you see "M" mode A-TTL -> -> M MULTI -> Once in Manual mode, you can adjust the flash intensity to one of six power levels by pushing the "+"...
1/4 Maximum power for MULTI mode 1/16 1/32 Minimum power for MULTI mode Flash OK Unlike flash units with an automatic exposure sensor, the Speedlite 430EZ does not have an indicator for adequate flash exposure. Automatic Operation Auto Zoom By default, the angle of flash coverage can be automatically matched to the lens and camera used.
A-TTL Preflash A-TTL (Advanced TTL) was Canon's extension of the TTL flash metering system. The primary feature of A-TTL was the addition of a infrared-filtered second flash tube and a forward pointing flash exposure sensor on the front of the Speedlite. As soon as the shutter button was half-pressed, an invisible preflash was emitted and the reflected signal from the subject measured to determine the subject reflectance, and indirectly, the subject distance.
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.
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The connecting cord system for multiple flash has been supplanted by the wireless E-TTL system, which requires an EX series Speedlite, and so is not compatible with the Speedlite 430EZ. Diffuser Flash coverage can be modified or widened by the use of accessory third party diffusers.