>>4441600 (OP)Very interesting at least. I loved learning about camera movements for example.
The zone system is still useful and the methodology is somewhat valid for digital. Adams was really trying to teach a scientific approach to exposure, and the discipline that goes with it in terms of visualising the output before taking the shot. Also the concept of photography as a transformation from 3d to 2d space by the photographer as an artist.
if you understand ettr, and have a printing workflow first and then read the trilogy (plus 2 sequels about lighting condition) you will get more out of it.