Quote Originally Posted by RalphLambrecht View Post

Did I say pinhole size affects angle of view somewhere?
No, you said pinhole thickness, not size - and that is what I mean to type in my response - sorry. But it is the same difference. As the light rays move in a straight line the angle of view is determined by the distance and size of the film. Only. In the diagram you show, light will correctly illuminate a wider field in the last example - but it is immaterial as it will miss the film and thus not affect the angle of view.

Lastly, the thickness has a simple geometric relationship to size - so whether the widest angle is due to size or thickness ... it really does not matter and thus neither does the distinction.

(None of this is very important - I almost wish I hadn't put in my two cents worth )