03-24-2012, 03:38 PM
[quote name='popo' timestamp='1332601641' post='16992']
Going from f/5.6 to f/2.8 will allow you to use 4x shorter exposures. But you must remember the depth of field will also change too. If that isn't too important, then also consider a prime instead. For example, a 50mm f/1.4 at f/1.4 would need 16x less exposure time than f/5.6.
[/quote]
Sure prime lens will perform best, but i'm shooting indoors mostly on family occasions, so using a prime while kids are running around won't be convenient. Therefore i'm looking for a zoom lens, just not sure if a f2.8 lens
will perform speedwise any noticeably better than my 3.5-5.6 lens and will reduce the number of blurred images.
Going from f/5.6 to f/2.8 will allow you to use 4x shorter exposures. But you must remember the depth of field will also change too. If that isn't too important, then also consider a prime instead. For example, a 50mm f/1.4 at f/1.4 would need 16x less exposure time than f/5.6.
[/quote]
Sure prime lens will perform best, but i'm shooting indoors mostly on family occasions, so using a prime while kids are running around won't be convenient. Therefore i'm looking for a zoom lens, just not sure if a f2.8 lens
will perform speedwise any noticeably better than my 3.5-5.6 lens and will reduce the number of blurred images.