Hi there,
Thanks for the clarification. I believe I got what you
mean. Does it then make good portraits wide opened? I
guess the 50mm focal length is too short for
comfortable distance between the photographer and the
subject.
Kelvin
--- Alin Flaider <[EMAIL PROTECTED]> wrote:
>
> By local edge I mean the limit between two areas
> with significant
> difference of illumination. Local contrast is best
> described as
> applying to points on opposite sides and very near
> to this border and
> characterizing the texture of the image, as opposed
> to overall
> contrast that compares the darkest and the lightest
> areas of the
> image.
> When wide open, the lens produces very small
> halos around the most
> pronounced edges and thus blends the two distinct
> areas around an edge
> still clearly defined. The resulting effect is a
> subtle, pleasing
> softness that suits certain subjects where mood and
> atmosphere are
> more important than absolute sharpness. By f/2
> aperture, the softening
> greatly diminishes, while at f/2.8 is not visible
> anymore.
> BTW, this is not the softness most other lenses
> display at wide
> apertures, where the blending completely erases the
> local edges and
> effectively compromises the sharpness. It doesn't
> show up in the MTF
> tests either - one more reason to take these with a
> grain of salt.
> ...
> Wow, hope this makes any sense.
>
> Servus, Alin
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