j1clark@ucsd.edu
Veteran
I have to wonder if also the lenses used have changed and become sharper.
Yes, lenses have gotten 'sharper' for several reasons. Older lenses, such as 'pre-50's' often were not coated. Coating became available in the late 30's, but the 'war' effort sort of put everything on hold. One can recall the business about Kaminski having the coating removed from modern lenses to get the vintage look of the shots in "Saving Private Ryan"(1998).
Each glass element in a multielement lens addes to 'flare' if not coated. The coating reduces flare. Flare decreases contrast, which humans interpret as 'sharpness'. In addition, older lenses where 'hand ground', and 'hand calculated', and so did not have the aspheric corrections to allow all the wavelengths in 'visible' light to be focused at the same point. The older lenses would have some aberations, and so, this lended to a 'softer look'. Since most films were B&W, the non-convergence tended to 'blur' rather than color banding/blur.