There is an alternative way to digitize slides that I’ve been using with pretty good results. If you’re into digital photography then you may already have the kit needed. Basically a digital SLR with macro lens, set up on a tripod to take a digital photograph of the slide on a light box or other light source. This is not a scan but an image of an image, but using proper quality camera gear should give far better results than one of the cheap slide copiers available.
Obviously if you don’t have or don’t want to fork out for a macro lens or tripod then this is a non starter, but I found a budget Manfrotto tripod for about £50 new and a second hand Tamron 90mm macro off ebay for about £150. Both of these will be useful for other photography tasks so a good investment.
The results I’ve got from Kodachrome 64 slides so far have been as good as I used to get with an old and very slow 2700 dpi film scanner. Certainly good enough for web / computer screen use. It takes a while to set everything up and you still have to post process with photoshop for colour adjustment, sharpness, dust cloning out etc, but the initial imaging process is very quick – put slide in cardboard frame on light box, click with remote shutter (and mirror lock up setting) remove, repeat. i.e. as quick as you can physically move the slides and click.
I’ve got thousands of slides to process and will be using this method.
example image here