 BetterPhoto Member |
Flash distance with FP mode Thinking about Buying a Canon 1v. They say it will flash sync. up to 1/8000 sec. with 550 ex. How much will this effect the flash distance. Will the 550ex figure the fast shutter speeds on the distance scale.
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Jon Close |
Toward the bottom of this page, http://www.usa.canon.com/html/cameras_speedlite/550exspec.html , is a table of the guidenumbers for various shutter speeds above the traditional sync speed. Note that the table starts at 1/125 because the 550EX can be used in FP high speed sync mode with all of the current line of EOS cameras, including the Rebels which have traditional x-sync of just 1/90. When used with the 1v the 550EX's guidenumber will be reduced only at speeds exceeding its traditional sync of 1/250. I don't have one handy to check right now, but I'm pretty sure that the distance scale displayed when shooting in Tv, Av, M with the speedlight is corrected for shutter speed when in FP mode.
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