Try reading the following:
Part 1:
<http://www.normankoren.com/Tutorials/MTF7.html>
Part 2:
<http://www.normankoren.com/Tutorials/MTF7A.html>
Comparison of several digital cameras with film:
<http://www.gnyman.com/Digital%20Cameras%20comparison%20with%20Film.htm>
In theory, 20MP may be correct but, in practice, when you scan with that
much resolution whatever is there tends to be masked and hidden by the
grain. Sometimes the grain even gives the impression of detail that's
really not there.
Chuck Norcutt
Bruce Nolting wrote:
> I seem to recall reading somewhere that in order to match the
> information content (resolution, color depth, etc.) of a professional
> grade 35mm slide (one taken on pro-grade film such as Velvia, using good
> equipment and technique) it would take at least a 20 mp sensor. I
> haven't seen anything that leads me to doubt that, yet, either. Now to
> go try and dig up the reference...
>
> Bruce
>
>
>
>>Chuck Norcutt wrote:
>>
>>
>>>As regards detail on digital and film, an 8Mp Canon 20D clearly
>>>surpasses what you can record on 35mm Provia.
>>
>>I'm afraid that absolutely nothing I have ever read or seen
>>suggests to me that that might possibly be true.
>>
>>Regards,
>>
>>Simon
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