from shooting over the years... 4x5 Ektar100, Aptus 75S, & Betterlight scanning back..my experience has been Ektar100 & Betterlight are about even. The Aptus was pretty much on par with scanned 6x7 Ektar.. with the Ektar getting slightly more detail, but with a little more background 'noise (grain)'. nothing scientific along the lines of comparing MTF curves of each of the lenses used. Regardless of the lenses used thought, the Aptus was never a competitor with the 4x5, and i'd wouldn't expect the Betterlight to surpass 8x10
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