Sirius Glass
Subscriber
+1 on this.
ZS is about being aware of the light falling the scene and how you can somehow control the relationship of these tones in a print (within limits), by a careful choice of exposure, development and print controls.
"Shadows on zone III" is just a starting point, often for a literal translation of the tones as the eyes see them.
100% I agree. The trigger post shows an incomplete understanding of the Zone System. That is understandable because Ansel Adams writing is at best confusing. Further elaboration in books and on the web only make the understanding harder to reach. It took myself a number of reads and rereads of his books and finally I got a breakthrough when someone on APUG broke it down to a simple explanation - "'Shadows on zone III' is just a starting point, often for a literal translation of the tones as the eyes see them."