I have been making many resolution tests on my camera lenses, with resolutions up to 80 lp/mm using the RIT test patterns. When I try to enlarge these patterns in my rigid Durst 138s at 2X, 3X, 4X & 6X with both a 100mm Schneider Componon or a 210mm Componon, all I have for resolution on my Ilford Multigrade V paper is a 10 to 12 lp/mm.
Has anyone measured paper resolution?