As I did not want to put my hardly earned money in a new one, I bought a full frame slide duplicator on eBay for 5 euros. Since my camera is an APS, the lense was too close to the rear mount, the slide mount was too close to the lense. Moving the lense closer to the rear mount was easy (just had to reverse-mount the lense internally), but the slide mount was still too close to the lense and out of focus. So I torn the slide mount apart, and added a small PVC pipe to lengthen the distance between the lens and the mount. As the PVC pipe diameter did not exactly match the original design and was a bit loose, I secured it with a metal clamp. This allowed some flexibility to perfectly adjust the focus.

Since then I digitized more than 4000 old slides from the 60s, and I’m perfectly happy with it.