I've wondered about this as well. I decided to use 100 (or 50) asa films in order to be able to use the lens in 5.6 to 11 mode. Most 35's have a plethora of shutter speeds and a shortage of usable f stops. Diametrically opposed to LF which has as few as one (!) instantaeous shutter speed, but all kinds of usable aperatures. When I was a news photographer (60 years ago!!), on a 4X5 I used f32 and whatever it took in shutter speed or flash to get what I wanted (and more importantly what the art department wanted---they signed the paychecks!)