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I made what is effectively a slide copier from a cardboard box and jammed it onto a lens hood so I can screw it on a lens. I use this with an aging pentax k-m and a 50mm macro lens exposing at f8 and .7s with a 2 second shutter delay to hopefully prevent any camera shake. I use a tablet showing a white image for a light source at some distance so the pixels don't show. My main concern is that I only have 10MP to play with, and the lens doesn't focus close enough to fill the frame (you can see the raw file here) so my resulting crop is around 2750x1850 pixels. I've tried using a 2x teleconverter and stitching the image, but that introduced some distortion and didn't noticably improve the detail (at least on a 1080p screen). So I'm guessing that as long as I don't want to make big prints or show them on a 4k screen it is probably sufficient.
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scoober
Love it, your scans look better than mine! What is your setup?