On 01.09.2006, at 16:08 , Mark Roberts wrote: > Yes, using high speed flash sync, with its attendant loss of effective > flash power. What I'm talking about is x-sync speed. Yes, but bear in mind that if K10D have iso100 then for daylight fill 1/180 s would be exactly as good as 1/360 s at iso200 in the same lighting :-) Cheers, Sylwek