It is somewhat a widespread, stubborn myth that one cannot digitize negative film using a digital camera.
After all, the notorious orange mask is only a single, monochrome colour "cast" that can normally be levelled out quite easily in a digital image processing program. It is usually only when you have more difficult negatives such as artificial light scenes on daylight film that one may run into major problems.
May I - quite immodestly - point to the following two small essays on the subject:
Negative Analogue Film Conversion Dias Duplication with a Digital Camera
As also stated in these texts: You may certainly not get perfect results each and every time - but you can "scan" lots of negatives and slides in a quick work-flow this way.
And yes, a quality scanner will produce better and more reliable results, but it also comes at the cost of a much more time cosuming process. (And perhap's one's precious, old negatives just aren't that good that they deserve a better resolution than, say, 6-12 mega pixels?)
B.R. / Steen G. B.