The problem with universal slide scanners is that cheap scanners have mediocre cameras and scanners with good cameras are, well, expensive. Luckily, Kodak (which was late with the digital photography revolution) realized that today's phone cameras are very good and that we stupid people only need something to hold a hundred or two slides or negatives. The Kodak Handy Film Scanner is perfect for this niche. You can build your own scanner, but they've packed all the parts into one handy package. Simply place the slide over the mini light table, point the camera through the hole in the cardboard and click. I have found that the scanner works best with my camera's 2x optical zoom. Unfortunately, the Kodak app only allows digital zoom, so I only use the phone's camera app for positive slides. For negatives, you'll need to use the Kodak app, which is pretty primitive when it comes to editing a scanned photo compared to other camera apps. In fact, this is one of the two major limitations of the package. Another limitation is that you can't adjust the height of your phone's camera above the slide. Packing box, universal. I don't worry too much about cardboard as I don't have many slides to scan. However, your camera may not focus at the specified height. Price? Yes, a bit pricey for something made out of cardboard and no batteries, but it suits my needs and I would buy it again despite its limitations.
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