hello, a friend of mine would like to scan his old dias, so he can use them in idvd. therefore he asked me, if I can recommend him a scanner. I like canon-scanners and so I recommended him the cansoscan 5200f or the canoscan 8400f. but I'm not sure, which resolution I need to get good photos for idvd. canoscan 5200f has 2.400x4.800 and canoscan 8400f has 3200x6400 so I would like to ask, if somebody has experiences with this topic and could share with me - thanks! ferdinand