Add in one other complication. Resolving power does absolutely no good unless the paper can reproduce it. You can scan files at far more than 300 dpi at the final output size, but if a printer can not use the extra information what good is it??
--- On Mon, 12/8/08, karl shah-jenner <shahjen@xxxxxxxxxxxx> wrote:
> From: karl shah-jenner <shahjen@xxxxxxxxxxxx>
> Subject: Re: DSLR vs 4x5 film
> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@xxxxxxxxxxxxxxxxxx>
> Date: Monday, December 8, 2008, 4:44 PM
> Another thing to consider with the resolving power of
> digital is as I've said before, the standard nyquist
> limit formula doesn't hold - resolving power is not 1/2
> the frequency but more like 1/3 (remember the angles!).
>
> so 12Mp can only accurately resolve 4Mp worth of data.
>
> add in the resolving power of the lens..
>
>
>
> the lowly 35mm format starts looking pretty good against
> that.
>
>
>
> but then that limit of resolving power really doesn't
> mean much either way (film or digital) until you start
> photographing important detail - for a solid block of colour
> the factors limiting resolution still apply but the end
> result would be the same irrespective of
> resolution/resolving power - you could upsample a 0.1Mp
> image to 100Mp and the result would be good as if you shot
> at 100Mp and downsampled ;)
>
> k
