Are you looking to copy your old slides into digital photo format but can't afford to invest many hundreds of pounds in a high quality slide scanner? Or are you finding that the copying of slides using a scanner is not fast enough and are looking for a quicker way to copy slides to digital images?
If so then there is a very cheap solution that allows high quality copying at the standard resolution of your camera. You can buy a slide copier for a few pounds on Ebay or elsewhere that attaches as a lens to the front of your full frame camera and allows you to copy the slides directly to the card in the camera at the resolution you choose. So on a Canon 5D Mark2 it means you can scan slides at up to 21.8 Megapixels, far higher than most dedicated slide scanners.
I picked up my Ohnar Zoom slide duplicator copier on Ebay a few years ago having previously owned one some years for its original pre-digital purpose of copying slides to enable you to crop out unwanted objects or to recompose a slide. It is important to note that the original slide copies were designed for film cameras so they are only suitable for full frame DSLR cameras. If you use a slide copier on a crop sensor that it is not designed for then the crop factor will mean that you lose part of the slide image.
I've just checked Ebay and there are still bargains to be had - this Ohnar Slide duplicator to copy slides onto your digital SLR camera sold for £1.24 plus £4.50 P&P - an absolute bargain to get high resolution, very fast copies of your slides into a digital photo format and much quicker and better value than a dedicated slide scanner.
http://www.ebay.co.uk/itm/OHNAR-ZOOM-SLIDE-DUPLICATOR-/170698333419?pt=LH_DefaultDomain_3&hash=item27be69dceb#ht_500wt_1413
