Dirk: Please explain diffraction degradation in laymen's terms.
RonS
Dirk wrote:
> The only real advantage for larger formats that I can see is a
> reduction in
> grain in the negative. There's an interesting article about the various
> formats on the photodo web site: http://www.photodo.com Basically, if you
> intend to blow an image from each format (35mm, 2 1/4, 4x5) to the same
> paper size, keep the field of view the same, *and* you want to keep the
> depth of field the same, then an interesting thing happens. Since
> the larger
> formats use correspondingly longer lenses as thier standard lens, you have
> to stop down further on the larger formats to achieve the same depth of
> field of 35mm. Then you slam up against the diffraction degradation in the
> larger formats. In thier test, using Tmax100, and the above
> limitations, the
> resolution was the same across all 3 formats.
>
> Be seeing you.
>
> Dirk Wright
>
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