You: personal opinion based, me; based on sources.
I'm a recognized expert on this subject. Your sources are garbage, for the many reasons given in this thread.
I think HJP "Doug" Arnold, who worked for Kodak knows better than you.
Unfortunately what you posted is mostly David Percy's ignorant opinion. This is how he treats "Douglas" Arnold throughout, and in his video. Percy presents a statement from Arnold, which is usually a reasonably accurate statement, and then Percy wraps it in his own commentary to make it sound like
his conclusions can be properly attributed to Arnold.
That's quite dishonest, but sadly it's Percy's stock in trade.
Arnold correctly notes that Ektachrome ISO 160 was chosen for its high resolution. Another thing Arnold could have mentioned is that the E-3 process is very lenient in the darkroom. It can be "pushed" in various ways to correct for the photographer's errors without compromising contrast or color. The technicians who loaded the film magazines first took several frames of standard reference charts. When the film came back, they clipped off these reference frames and developed them in snippets to identify and correct for any effects suffered during their use in space.
Percy says that he would accept the use of color reversal film if the astronauts had exposed a standard color chart for use in color calibration.
That's literally what NASA did!
In addition, the astronauts in later missions took a gnomon that provided provided both a color reference chart to capture
in situ lighting and a reference for local vertical.
As usual, Percy has done little to no actual research on Apollo and presents the result of his considerable ignorance as if they were some kind of flaw or failure on NASA's part.
