8200i is only suitable for 35mm slides and 35mm negs. I had to replace my Plustek Opticfilm 7200 recently as it was not Windows 10 compatible. After looking through various scanners I decided to just upgrade with a 8200i recently. I have started to scan some slides and experimented with various settings, and settled on 3600dpi as good enough with a reasonable size scan, of the order 7-8Mb. The Silverfast software takes a little getting used to, but the box came with two booklets of instructions, somewhat of a surprise these days. One can follow a flowchart of operations from the top left running right, but you can opt to miss out the more lengthy processes if the slide is reasonably well distributed, with not too many shadow/bright contrasty areas. I have found if I prescan (advisable), then colour cast correct (recommended but one can use ordinary software for that) and then scan. It takes a couple of minutes to scan at that resolution. If there are dark areas one of the other steps is for it to scan twice and combine the light/dark scans, but I have found it just as easy to do that elsewhere. I am pleased with the results so far.