I understand...

However at minimal ISO the noise is about as good as regular APS 
cameras, right? Then, for this case only, the f/2 zoom would be 
beneficial, isn't it?

Boris


Dario Bonazza wrote:
> Adam Maas wrote:
> 
>> It's pretty simple. The 4/3rds cameras are noisy at moderate ISO's. 400 
>> on a 4/3rds body is as noisy as 800-1600 on a larger sensor. So you need 
>> faster lenses to be able to shoot in the same light with similar amounts 
>> of noise. Thus the f2 zooms get you no real boost in speed, since they 
>> only make up for the lower ISO necessary due to the noisy sensor.
> 
> My thought exactly.
> 
> Dario
> 


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