Digital BW, The Print

Not sure what you concluded last time this was discussed, but I've been
printing a lot of 256 step gray wedges on luster paper and I
can easily discern a difference of 1/256 L* between approx L*80 and L*10.
Doing some basic sampling of steps I can distinguish and steps I can't, my
gray tonal resolution under a good light seems to about L* 0.25,
probably less in my optimal zone, which appears to be around L* 50. This is
of course with a step transition between levels, which makes perception of
the change rather easier. Mike


On 14/11/06, Steve Kale <stevekale@...> wrote:
>
>   And presumably, limiting all of this is the eye¹s ability to discern a
> difference in luminance. Of course everyone¹s eyes are different but one
> could estimate an average ability to discern a difference in L* (with a
> nice
> normal distribution around that?). I remember a debate here as to whether
> one could see a 1 L* difference. Even if we agree we can see a difference
> of 0.5 L* (nicely printed in reasonable-sized patches), most matte paper
> could only print c166 discernible shades of grey.
>
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>
> 
>


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