Fantastic, what an interesting process, I just did a quick Google and saw it converts slides. Usually with pros though one "can" do it at home.
DIY is the way to go. I looked at commercial conversion when digitized my parent's slides and the cost bought me a mid-range (Epson V550 Photo) scanner. The May 2nd POTD shows the camera/lightbox I "graduated" to - and shows the scanner sitting idle. Elected the upright lightbox rather than the more traditional flat as my tripod could handle either, it is steadier and less likely to tip in the normal camera mount position. Only criteria was that had to be cheap and tried to use items that had on hand. Cardboard box initially to test, then built with lumber scraps from other projects. Lighting is a battery operated LED video light. Obviously, had the camera and lens, initially an ancient Sigma 50 macro on Nikon mount with Sony adapter, but wanted more distance so did purchase the Sony 90 macro which has many other uses. If no macro, probably could use a 70-200, but a new lens added to the collection is never a bad thing. Box internal could have been white paint to avoid brown lumber bleed impacting color balance but had some white foamboard and cut to size. Only "new" items I actually bought were non-skid pads set for bottom (cardboard box wobbled), and noted heat so purchased small, quiet, computer fan that connected to USB (not 4 pins on motherboard) and used a USB battery to power - but apparently doesn't get that hot as the fan apparently has a thermostat and rarely kicks it on. Lower back is open to slide the video light in and control its brightness, and it also created the beginning of a cooling airflow path.
In usage, I don't try to match the film dimensions, but include a little of the frame - then crop in post which also eliminates the rounded corners. That would be asolutely essential if using a regular lens, like a 50 or 80 prime or 70-200, that don't have the flat plane of the macro. You can more aggressivly crop to take out the edge softness.