Just buy any digi cam that can mount an adapter to accept 52mm filter thread and then use HOYA close up lens to achieve 1:1 (use x2 or x4 depending on the min focus distance of the cam). Place the slide on a light box. Copy with your digi cam supported by a solid tripod. The DOF is extremely shallow, to prevent focusing problem, make sure that the slide is parrallel to the CCD. To get the best results, TURN OFF THE LIGHTS IN YOUR ROOM, Use only optical zoom and the highest quality image setting so that you can crop away, if any, the excess data.
seems a lot of trouble using e adaptor..
somemore.. resolution is not that good if ur DC is not a 4 megapixel at least..
But then again if u using for web stil fine, (i use often for print..cannot have low res)
i think the best thing to do is find a couple of friends n share a film scanner.