>> There are times that I have wished for a larger format than 35mm and even
>> the formats on 120/220 film. For whatever reason - and the reasons varied
>> at different times - I could not see getting and using a large format
>> camera, even a small large format camera, like a 4x5. With the possible
>> coming of the 645D (or is it the D645?) I'm wondering about how great a
>> quality boost one could get over a K10D. Might it get reasonably close to
>> 4x5, assuming the Pentax implements the technology well? How about 6x9 If
>> the 645D won't approach these quality levels, what sort of pixel count and
>> sensor size - again assuming good implementation of the technology -
>> might?
>>
>
> The digital cameras seem to give an apparent quality similar to the next
> format up from film, but upon close inspection, the appearance falls down a
> bit.
> The lack of grain inherent in digital makes my K10 images look very similar
> to those from my 6x7, but close inspection reveals that the 6x7 images hold
> more detail than those from the K10.
> I would anticipate that the 645 digital will probably look remarkably like
> images from 645 or 6x7 film. Once you get to medium format, grain isn't much
> of an issue, unless you are making very large prints.
>
> William Robb
>
From what I've read, the comparison isn't quite so clear-cut.
It's definately a function of film speed. Last time I looked at the
stuff, 35mm film was higher in effective resolution than APS digital for
ISO levels below 200 or so. Above that, film grain dominated the film to
the point where the effective resolution was less than digital.
Of course grain is a whole different animal from digital noise, so
a big grain of salt is required to swallow such comparisons at all.
-Cory
--
*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
*************************************************************************
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