Do we still "need" fast lenses ?

Started 6 months ago | Discussions thread
olyflyer Forum Pro • Posts: 25,955
Re: Do we still "need" fast lenses ?

Sergio Subrizi wrote:

Considering we have:

sensors with incredible iso performances compared to films

in camera +- 5 stop VR

Auto gain viewfinder

I can only see a shallower depht of field when used wide open as great advantage

at the expense of weight and $$$ ( for the same level of quality)

Do I miss something ?

No, you don't miss anything. The only reason to use fast lenses is the DOF. Some times f/4 results in too much DOF, some times f/8 is what's needed, so it depends on the image composition. If I need more light I reduce the shutter speed. If the shutter speed is too slow then I increase the ISO, or use flash or some other additional light sorce. Aperture is used for DOF control only, that has always been the case. It can't be used to increase light because it changes the composition.

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