Whoever chooses to switch from the classic darkroom for whatever reasons to a digital one, he or she needs to be somewhat acquainted with the what-how-why-which-where details of scannign film negatives. One needs not to have a thorough knowledge, but even so, a review made a specialist can always come handy.
This link provides an overview of all film scanners testing, sorted according to the producer. There are also older test reports of those scanners that disappeared from the market long ago. Finally, there are a lot of film scanner buyers who want to purchase a used device. Also, on offer are some Accessoires and adapters for many older devices.