Marc,
You can push the flash sync shutter speed on the Canon EOS 5D (and most Canon DSLRs) just a bit, by using a Pocket Wizard MultiMax Transceived as your transmitter. The MultiMax allows for you to set a specific delay, so that it will delay the RF signal to your receiver and flash system. Depending our how short of a flash duration you are working with, this can allow you to "move" your flash duration (shorter period of time) further into your flash sync shutter speed (longer period of time). Again, this is dependent on your flash duration, as to how effective (if at all) this can be. I have seen this work quite well with all of the EOS 1D/1Ds Series cameras.
Traditionally when you sync with a flash under normal settings, the flash is tripped upon the shutter opening. This delay is tripping the flash shortly after the shutter opens, further "into" the flash sync shutter speed.
Aside from this, your best bet is to use a ton of flash power, and put ND or Polarizing filters on the lens. You will have to raise your flash power, but your filters will help keep the ambient exposure down.
Regards,
Jordan Miller
Hi all,
Have a shoot coming up.
External location.
Daylight.
Using powered flash heads also as extra / fill light (bowens gemini)
Want very shallow depth of field so large aperture so high shutter speed (approx 1000th or similar) even at lowest iso.
Is there any way around the 1/200th snch speed of the canon 5d dslr body with external flash heads aside from stacking up nd filters on the lens?
Thanks.
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