For me, the notion of what constituted the photographic art form started in the early 1970’s, when photography was an analogue and optical-chemical discipline.
For all practical purposes the techniques I used in my formative years were subtle refinements and adaptations on what photographers in the 1930s and ‘40’s had done. And they were working with subtle refinements on what great photographers in the late 19th Century had created. My 4×5 view camera, film, and chemistry differed little from that used by Ansel Adams or Walker Evans. Their techniques were fundamentally not far removed from what Frederick Evans, Brassai, or Atget used a generation earlier.