I give you a few reasons why I never use F/2.8. All of my lens can actually open up to f/2.8 but I discuss a few points on why I mainly set my aperture to f/4 and forget it. Of course there is a need to be able to open and its great to have it as a tool and feature. But too many people fall into the stigma of always needing to shoot that wide open just because they have it. Like mentioned in the video, most lenses are not even their sharpest at 2.8. The sweet spot for image quality is higher. I do use f/2.8....but not as much as f/4 for weddings and events.