David H. Bebbington said:
Just who is erroneous here? If you are scanning for the web, OF COURSE you do not need massive resolution or huge files, you need a small low-res image, but one which gives a reasonably accurate impression of the actual "real" picture. There is no parallel with analog photography, where very cheap old cameras, even for $1 from the thrift store, will "do" if you only want a very small print. A scanner with a low Dmax will produce hideous artefacts in the shadows of transparencies and will totally fail to record the highlights of b+w negs - the result will be rubbish, even at 72 dpi on a monitor!
Just to make it absolutely clear that this is not some kind of techno-fetishism - the attached picture was reduced to a JPEG file 5 inches wide and 100 ppi. For this picture to work, I need smooth artefact-free tone even in the deepest black. Through a process of expensive experimentation, I found that a Nikon Coolscan would give me this, whereas my previous Canon film scanner (I think an FS2700), although it has the same nominal resolution, just couldn't hack it!
Short advice to get_me_a_gun: If you think a cheap scanner might do, be sure to try one out before you buy. If the results are acceptable to you, fine - just remember that cheap scanners have the (severe) limitations I have described!
Regards,
David