Mike over at ToP ruined a perfectly good post by mentioning punctum in it, and then by citing contemporary usage of it! Horrors!
I have decided to throw in the towel on this one. Punctum means the eye-catching detail that makes me like the picture and I suppose then studiom must mean everything else?
This is contemporary usage, the word has come to mean this, and I will allow that it's a much more useful meaning that the one Barthes proposed, which I have (brilliantly, natch) argued is a meaning more or less unique to Roland Barthes.
What gets my goat here is that Barthes is going to continue to be credited with this.
It is as if a fellow suggested placing a slice of cheddar cheese on a graham cracker, and on top of that a freshly toasted marshmallow which slightly melts the cheese, producing an incomprehensibly disgusting snack. Because the fellow was fond of circumlocution, and thus near impossible to read, cheese was widely misunderstood as chocolate and now this idiot is, somehow, credited with inventing the s'more. Which he did not.
But there doesn't seem to be anything to be done about it.