I've recently purchased this Panagor Slide Duplicator. This object is quite cheap, the lens quality is not outstanding but it is tank build.
My aim was to verify if the quality reachable with slides is higher than a film scanner (I use a Plustek7200). I want to show you some fast shots (200ISO and sky as light source) with some rugged sildes.
Results have been really good.
These are from a Fuji Velvia 100F and Contax T2: true scanner killers
This is a crop from the last.
These again from Velvia 100F and Minolta 35mm f2.
With a macro lens using a flash probably I would reach better sharpness.
The real gain of A900 over a film scanner is the lack of Dmax: the quantity of light is not fixed, we can change it as we want, and the CMOS hilight outfit helps. Shooting RAW we can remove color dominant easily, and the whole workflow is faster.