Camera & Lens
Just about any semi-modern interchangeable camera will work great for camera scanning. There are many mirrorless or DSLR options to choose from, with the most convenient offering tethered live view capture to your computer. The Canon T2i is probably the cheapest option out there with tethering and large lens selection, and new cameras like the Sony A7 series are now very affordable with great IQ. High end setups may even use the new full frame Panasonic mirrorless cameras with pixel stitching.
For camera scanning, the one real requirement is that your lens focuses close enough to capture the entire frame, without having to digitally crop. For full frame cameras and capturing 35mm film, the term 1:1 designates a lens that will reproduce the 35mm frame exactly onto the full frame digital sensor. With crop bodies, 1:1 focus even closer. There are also options to use extension tubes for older macro lenses. We have had excellent results with an inexpensive Nikon 55mm macro from the film days, using a simple extension tube to get 1:1 on our full frame bodies. Higher end, yet affordable options include the excellent Sigma 70mm ART Macro. The Outside of reproduction factor (1:1), also look out for lenses that are sharp, have good color reproduction, limit internal reflections (modern coatings), and have very little vignetting. Finally, it’s generally best to use your lens stopped down 2-3 from wide open, as this gives a good combination between depth of field and brightness.