I keep coming up against a problem where the focus on my portraits is not quite right , despite using a loop and double checking. My loupes are x10 and x12. When I focus I make sure to center on the eyes, moving and back and forth until I'm certain I've reached the sweet spot. Despite this many of my portraits keep coming out a little soft, and seemingly just fraction or two out of focus. I'm typically shooting at fF5.6.
I don't seem to have this issue with landscapes, but I'm assuming that's because I typically shoot at a much narrower aperture (f22 for example).
Recently I have been using a lightweight travel tripod after losing a part for my heavy one. Could it be a vibration issue? Again, this issue does not occur on the same tripod when shooting landscapes.
I have included some examples of the issue I have been encountering. This issue has only occurred outdoors. I have included an image of accurate focus indoors from the exact same setup.
Thanks in advance for your help!
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