How about using slave flashes positioned closer to the frame?
Or a wide angle lens and you wouldn't have to back away.

 >On 12/30/2010 10:55 AM, [log in to unmask] wrote:
 > Randy said <So the limit is simply the resolution of the  camera,
 > defined these days by megapixels.>
 >
 > Not necessarily so.  At 100 ft, the limitation is likely to be  light 
which
 > falls off dramatically.  You might get around that with high  ISO rate.
 > Jerry
 >


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