Alan Mahon wrote: > I have a Canon EOS1DS (and very nice it is too) > > I would like to shoot with flash in daylight as if it was night. > To achieve > this I would use a fast flash and a fast sync to overwhelm the ambient > light. I have tested the 1DS sync and found that it fails at around 1/125, > showing a shadow appearing across the frame. > The funny thing is, I am of course not using film therefore there is no > reason to have the shutter alone to control the duration of exposures - a > more rational system would be to have the shutter limited to a speed that > it can achieve cleanly with flash, say 1/60 or 1/100, and have any shorter > exposures electronically controlled rather than mechanically, > allowing ultra short sync speeds to be possible.
The 1Ds uses a CMOS. Hence, the shutter does indeed control the flash duration. For dedicated flashes, the sync speed is 1/250, for studio strobes 1/125. Try the 1D, I've read where it has attained speeds well above its quoted 1/500th. Dave =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
