Just out of curiousity, AA has a picture in one of his books of a deep conifer forest scene, with nice tonal separation on the trees and open shadows, shot using a 44A filter, which he says gives an 'orthochromatic' response. Would Efke-25 unfiltered mimic that look? It would make it an interesting woods, foliage, and jungle film in that case.

(I know, I know, order a couple of rolls and go find a pine tree to get a real answer)