Re: film vs. flatbed scanners

Scott W wrote:

Chris Loffredo wrote:


You need to zoom them yourself (for example by saving tehm to disk and
opening with Photoshop). Resizing the images (using interpolation) would
falsify the results.


Why should using interpolation falsify the results?
In fact if we up sample you 2700 ppi scan it looks exactly like the
5400 scan.
http://www.sewcon.com/temp2/5400_vs_2700.jpg

The point here is that you could have gotten the same image scanning at
2700 and up sampling as you whould have scanning at 5400, it is take
Photoshop a lot less time to up sample then it does to scan at 5400
ppi.

If the original image is very sharp then 5400 dpi will show up. If the original image is limited in resolution, then a lower scan dpi will yield the same thing.

The images that you post above indicate that the sharpest tool was not used. The quality chain begins with a sharp lens, properly focused, high res film and a dead still tripod and high shutter speed (or flash as majority light contributor). I'm not sure what your full fram image was, but another 'factor' is that long range photos using a telephoto are among the worst examples and add other "smoothings" from air currents.

The great majority of images will scan fine up to 3000 - 4000 dpi. Very few will benefit from higher. But those that do have to be be shot critically as described above.

And then, to get the most out of the image, a drum scan will get more detail at any given dpi than an "air space" film scanner.

Alan


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