Yes, he did mentioned the limitation of his 4000dpi scanner. Same for my
test so I did it with a microscope too, it definately shown some more
resolution in microscope view.
Even under these limtation the resolution of film is still much better than
a 6MP DC how can luminous-landscape in their film comparision with a 3MP DC
got almost the same resolution as Provia 100F? It is definately a fault test
result.
C.H.Ling
----- Original Message -----
From: "Tim Hughes"
>I always enjoyed some of his careful discussions, but it always bothered me
>when he is doing his
> comparisons with film, using a 4000dpi scanner, which of course is
> another digital camera which
> adds its own optical and digitisation errors,grain aliasing and transfer
> function to the film. In
> a particular example, we know how difficult it is to get good scans from
> say kodachrome, where the
> contrast (dynamic range)seems to suffer substantially. It would have been
> nice if he had been able
> to use something like a scanning microscope photometer for some of the
> film resolution tests. Also
> given the lenses he used, they may have become quite limiting, making both
> digital and film look
> similar at the higher resolutions, even if they were not. Once you
> multiply the MTF's together the
> lens has to have a lot higher MTF to be able to see any meaningful
> differences in the rest of the
> system. It always seemed like in particular, low speed B&W films would
> really have been short
> changed in his tests.
>
> Tim Hughes
>
> --- "C.H.Ling" <chling@xxxxxxxxxxxxx> wrote:
>
>>
>> I think some of you might have seen this:
>>
>> http://clarkvision.com/imagedetail/film.vs.digital.summary1.html
>>
>> Details here:
>>
>> http://www.clarkvision.com/imagedetail/film.vs.6mpxl.digital.html
>>
>> Clark's conclusion is Velvia film is equal to 15MP DC in resolution. 3MP
>> is
>> really hard to believe!
>>
>> C.H.Ling
>
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