I have several thousand 35mm, medium format and 4x5 slides and negatives of all types that I would like to scan.

For the 35mm, I have a Nikon Coolscan 5000 scanner, and for the medium format and 4x5 I have an Epson 4990.

Alternatively, I heard that it's possible to use a DSLR for this task.

Once I firgure out the best way to do it, I plan to hire someone to do the scanning using my equipment.

Is it better to use scanners or DSLRs for this task?