Quote:
Originally Posted by Jonathan Farmer
Copying a slide using a macro on a digital camera or any camera will not render results as good as a scanner for a few reasons; 1)…. Image quality will be lost due to creating a second generation using optics while the scanned image would be a direct copy from the slide. 2)… The camera can’t create a file big enough.
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Jonathan: I use a D200 and a Minolta 5400 scanner. The scanner does not get all of the detail from a Provia 100F slide (though it is close).
File size is rather misleading and although a scanner creates a large file, the file size is a poor measure of the amount of information in the scan. For example I can take a file, and make it bigger with interpolation, without increasing the amount of information. What matters is the quality of the scan. In practice a scanner is limited by the quality of the lens (it uses a lens), and the accuracy of the stepper motors.
Also I am suggesting using a macro lens and extension tubes, to go beyond 1:1. In other words, I suggest zooming in on part of the slide, so as to make sure that the DSLR captures all of the detail from the slide within the cropped area.
You might find this rather interesting:
http://www.borutfurlan.com/test_results.html