Hi Bruce. A couple of quick comments, while I'm away from home, and more to follow when I get back in about a week's time. I have a Canon ??? scanner which I bought some years ago, which seems to do OK at this - but I haven't really tested it exhaustively. There's a couple of important points about it:
- it is a high-resolution scanner, which you'll need if you want something from the scanner that's going to give acceptable print quality output. You can do the sums to work out what you need - but 1200dpi scanning probably isn't going to give you an image that's much better than acceptable website resolution; since your original is only about 1 inch in smallest dimension, a 1200dpi scanner will only give you an image of (about) 1800 x 1200. Lots of the multi-purpose printers available these days include scanners, but you should check the specs for this carefully if you're wanting acceptable results from slide scanning.
- it has special holders for slides (and a couple of roll-film formats) that keep them aligned correctly. Without this, you run the risk of slides moving as you close the scanner lid, which will then require you to rotate the resultant scanned images to restore them to the correct orientation.
Several years ago, a couple of volunteers scanned a selection of slides from the old BOCA slide collection. Subsequent examination of these reveals that there are colour problems with most of them; we've not yet had any resources to devote to checking this and correcting them. My opinion is that it's highly likely that you'll need to do this with any old source material (I've had to do so with scanned old photo prints); the correction is likelt to be the same for all, so image processing software that allows you to do batch processing - applying the same "recipe" to lots of images - will be something that you'll need.
Rob
BirdLife Photography Website Administrator