If you want these to look like 35mm film from the 1970's, you need to add some obvious film grain to the images. The large, plain side of the white house..if that had been shot on film, we'd likely see some grain there. Same with the sky in that frame...too smooth, no grain,looks digital. In another vein, the tonality looks very "digital"...these look digital. Low noise, smooth broad areas with NO visible grain, and compressed tonal range. Film images that were shot on ASA 125 to 400 B&W film and developed in almost anything, anything at ALL,would show grain in the sky,and on larger, smooth-toned expanses.