Can you use two flashes?

**EsBee** · 04-15-2010, 09:25 AM

Originally posted by SOldBear

Dubious doesn't want to use the on-board flash to trigger the external flashes, which are in "dumb" slave mode (not all of his external flashes are Pentax-dedicated that support "smart" wireless flash).

- If he uses the on-board flash as a "smart" controller, it will emit a preflash strobe in an attempt to communicate with the "smart" slave flashes. This will trigger the "dumb" slaves before, not during exposure.

- One way to trick the on-board flash to emit only the main strobe is to use a manual lens. But in this case, the on-board flash will fire at full power, thus contributes significantly to the exposure (unless Dubious somehow block the light from the on-board flash).

Got it, and I was under the assumption that all of the off-camera flashes being used were Pentax-compatible.

I've seen a Nikonian buddy run into the same issue with studio lights which had had built-in optical slaves, which were being triggered during prior to main flash.

He ended up using Cactus 4s for his setup.

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04-15-2010, 09:25 AM	#31
EsBee Site Supporter Join Date: Jan 2009 Location: National Capital Region Posts: 739	Originally posted by SOldBear Dubious doesn't want to use the on-board flash to trigger the external flashes, which are in "dumb" slave mode (not all of his external flashes are Pentax-dedicated that support "smart" wireless flash). - If he uses the on-board flash as a "smart" controller, it will emit a preflash strobe in an attempt to communicate with the "smart" slave flashes. This will trigger the "dumb" slaves before, not during exposure. - One way to trick the on-board flash to emit only the main strobe is to use a manual lens. But in this case, the on-board flash will fire at full power, thus contributes significantly to the exposure (unless Dubious somehow block the light from the on-board flash). Got it, and I was under the assumption that all of the off-camera flashes being used were Pentax-compatible. I've seen a Nikonian buddy run into the same issue with studio lights which had had built-in optical slaves, which were being triggered during prior to main flash. He ended up using Cactus 4s for his setup.