For optimal results, I'd suggest scanning the negs on a dedicated 35mm film scanner (note, NOT a flatbed). This is likely to achieve the best results, but even that process requires the investment of some effort to get a.net quality results - I think that the following is one of my better recent scans (35mm scanner), but do consider that it might not have made the database had it been a current subject:
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Photo © Andy Martin - AirTeamImages
Photo CDs can be very patchy in quality, often not good enough for a.net - believe me, we see them, and when it all goes wrong we also get the "but it was scanned onto CD
by the lab so it must be good" thing - oh yeah? Scanning largish prints is an option, but again be prepared to invest quite some effort to get them to a.net standards - whilst Gary achieves very good results, do consider he does invest more effort than just clicking the scan button to get them looking nice, and that his scans are usually of old subject where we give a little leeway on quality.