Does it pay to go into one of the high end medium format cameras for scanning or is something like a nikon d850 more than acceptable??
Which camera or is any high pixel count camera viable??
Thanks in advance!
Peter
Unless you're looking to spend a lot of money on a good macro lens, I would recommend a camera with an APS-C sized sensor if scanning 35mm film, or, full frame on medium format film. If you go for a full frame camera to scan 35mm film, you have to spend money to get a lens that can actually go a full 1:1 AND be pretty sharp all the way out to the corners. Those lenses tend not to be cheap, and it's easier to get good performance if scanning a larger piece of film with a smaller sensor.
Other than that, anything in the 20MP-30MP range will be fine for most uses unless you're planning to print super huge or do some other niche thing. More resolution is not a bad thing, but whether you actually need it will depend on what you're planning to do with the files. Avoid Fuji with x-trans sensors, they don't have enough red and blue resolution to really do justice to color negative film.
If you're just starting out, spend the money on getting a good light source, and a good way to hold the negatives flat and aligned with the camera. The light source should be as bright as possible. The light and holding the film will give you the most bang for the buck. From there, spend as much as you can afford on the best macro lens you can get for your chosen camera system, then once that is all sorted, you can spend money on more actual resolution, if you need it.