"John A. Lind" wrote:
>
> Dan,
>
> Considering lens speeds, there is often a misconception about f/3.5 versus
> f/4. They are only 1/3 stop apart, not the half stop many think it is.
> That's right, f/3.5 is only 1/3 stop faster. For me, f/3.5 versus f/4
> wouldn't be a consideration.
>
> I would be sorely tempted to take the 50/1.8 regardless of what other
> lenses you might pack along with it. It is a standard lens and clearly
> faster than any other you have; 1-1/3 stop more speed than the f/2.8 28mm.
> If you have any thought you might want to shoot some available light
> indoors or outdoors in low light, then find room for the 50mm.
>
> Be careful with ISO 400 outdoors. It can get you into trouble under "sunny
> f/16" conditions. It will put you into f/16 @ 1/500th or f/11 @ 1/1000th
> and preclude narrowing the depth of field. Given the lens speeds you have,
> under general outdoor daytime conditions, the ISO 200 should be fast
> enough. Again, what is the likelihood of wanting to do something under low
> lighting levels? That would be the major reason for using an ISO 400.
One option would be to pack a 3x or higher neutral density filter so as
to gear down on exposure combinations and get better depth of field when
need be.
jh
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