Some more reference shots, btw the autofocus of the lens tends to be out of focus sometimes, so i'm getting about 70% focused vs 30% out-of-focused shots.[/QUOTE]
[url]https://www.lensrentals.com/blog/2011/10/notes-on-lens-and-camera-variation[/url]
[url]https://www.lensrentals.com/blog/2011/10/the-limits-of-variation[/url]
[url]https://www.lensrentals.com/blog/2012/07/autofocus-reality-part-1-center-point-single-shot-accuracy[/url]
[url]https://www.lensrentals.com/blog/2010/03/this-lens-is-soft-and-other-facts[/url]
... and so on and so forth .. happy reading :)
Not to mention what has been highlighted already: any sensible focus test has to be conducted under controlled and stable conditions. You noticed already the changing light conditions on stage.
Google search word: focus test chart. Do read the manual that comes with it.