Is it possible to say that picture quality is better with small f number but on very small DOF, so this perfect quality degrades very quickly?
So basically is there any reason to shoot with big aperture except to separate foreground and background? It is mostly theoretical question, so I do not consider shutter speed and blur with big F etc. The question is about picture quality in perfect focus with different F numbers.
In other words assuming we have ideal photoshop which can separate each object from background, so we can easily programically blur background and get same quality image... - and I want to understand where I'm wrong