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Old Apr 15, 2009, 1:53 PM   #1
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The cameras are a Canon Photoshot G5 and a Panasonic DMC-FZ30 bearing 0.5x auxiliary lenses. I wish to shoot interiors for a decorator, placing slave flashes at strategic locations. Does utilizing an external flash mounted on the hotshoe override the pre-flash? (Sunpak primary flash operates safely with a trigger voltage under 6v.)
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Old Apr 15, 2009, 3:23 PM   #2
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If you use a dedicated flash that's aware of your camera settings, you will usually have a metering preflash with most digital camera/flash combinations, unless the flash supports manual power settings, too.

If you use a non-dedicated flash (for example, a Sunpak 222 Auto, Sunpak 333 Auto, Sunpak 383 Super), these are not normally aware of your camera settings and will not fire a preflash (they don't understand the camera's commands on the extra shoe contacts for using a preflash, and are simply waiting for the camera to close the circuit between the center contact and outside shoe before firing).

With a non-dedicated flash like these, use manual exposure on the camera, setting the flash and camera to match for ISO speed and aperture (or use a manual power setting on the flash instead).

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Old Apr 15, 2009, 3:46 PM   #3
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Thanks, Jim,
It's a Sunpak 422D with a full range of settings. Since it's used only on these two cameras, guess I'll follow your advice and leave it permanently set for manual.
Gene
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