35
Power Level
GN (meter) at 105 mm, ISO 100
Normal Flash HSS Flash
1/1 56 28
1/2 40 23
1/4 28 20
1/8 20 17
1/16 14 14
1/32 10 12
1/64 7 10
1/128 5 8
2. The continuous light output in
HSS ash does not freeze a moving
o bje ct a s a n o r m a l a s h w o u ld d o.
Instead, an HSS ash will cause
motion blur, much like a
continuous light source would. In
order to freeze motion using the
HSS ash, you need to use high
shutter speeds.
3. Increasing the shutter speed
above the x-sync implies that the
c o ntr i b utio n of t h e a s h
decreases accordingly. Whenever
changing the shutter speed, you
a ls o n e e d t o a d ju st t h e a s h
power level if you want to
maintain the same contribution
of t h e a s h.
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