If you have any doubt you can see this: https://petapixel.com/2017/05/01/160...s-500-scanner/
For 4x5" the V850 resolves even more than the Hassy. For 8x10 the V850 is really poweful, see here the bolts at the top of the bell, compare the crop size. https://www.flickr.com/photos/125592...posted-public/
The V850 (and all the flatbeds) has more stray light than drums, drums can see better very deep densities that are not normally present in color negative of BW, but can be there sometimes with slides.
With the V850 use Multi-Exposure feature (of Silverfast) in you have very, very deep shadows in slides, but in that arena is where drums and the hassy excels, at very high cost.
One think I find is that V850 image is less cooked by the scanner/drivers than with Pro scanners, but as that article (petapixel) mentions it can be solved with some clicks with Photoshop, some sharpening and an slight touch in the curves solves it.
IMHO V850 is not as good for 35mm film, it is acceptable for most shots, but a very sharp (unusual) shot may deliver more with other gear. A powerful combination is having a 35mm only dedicated roll film scanner like the Plustek, and a V850 for MF and LF. With that gear you only may need a drum service for Velvia very deep shadows if that it is important.
Color negative film it is easy to scan because in the digital minilabs era most common negative color films were re-engineered to have overlapping clouds to perform well in Frontier minilabs and the like, while Velvia retains smaller clouds.
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