by ʇolɐǝz ǝɥʇ qoq

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I have a large amount of slides and negatives I want to digitize. I'm thinking about using a slide copier to do this, but own Nikon d5100- a crop sensor. After de-magnifying the image, how will this affect the original image's appearance (from the slide) in digital form?

This will drop my resolution, but will it do anything else too, like cause lens distortion? What type of lens would I want to use?

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up vote 1 down vote accepted

As long as you use a proper focal length lens, it shouldn't matter if the sensor is APS-C or full frame unless you hit diffraction limiting issues (which you can avoid by choosing your aperture to balance sharpness and diffraction, ideal value varies from lens to lens.) You simply don't need as much magnification to fill an APS-C sensor with the image, so the focal length you use will be smaller.

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