allenleonhart
Senior Member
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Flash does not equate to high shutter speed. You can shoot with flash at 1/500 the same you can at 1/5, just different results.
Bottom line is VR/IS cannot replace fast shutter speed when you need it.
good ans
consider the following scenario, in low light conditions.
f5.6 @ 1/60 + IS vs f2.8 @ 1/120
(numbers are randomly plucked from thin air)
u can stop motion (acceptably) with the f2.8 at 1/120, but at 1/60 likely to have motion blur of your subject. IS is good for handholding, but it cannot replace faster shutter speeds especially when shooting moving targets. nice to have, but not a must have.