Dirty Digitiser 

I took an old slide projector I bought on ebay, changed the lamp for a weaker one (100 W for now, the 50W one will arrive soon), put a dispenser in (taken from an Ikea lamp) and put a grey filter in front (as it was still too bright). Then I directly photogaphed the slides with a macro lens, the lens of the projector being removed.

The RAW images then were converted with ufraw in automatic mode or, if this failed, with ufraw/gimp manually. It took about 30min to digitise 40 slides, image treatment afterwards was about 1 hour, I guess.