That is weird. The thing is the foreground does not react nearly as much as what’s going on in the background. Almost like a compression issue more then focal fluctuation.
Shoot it live, save the hassle. We have shot touch screens up close for “how to” videos. Adjust the lighting to minimize glare. Hand comes in and selects a button, looks fine.
Ya, we have a decklink studio card in one of our edits. It’s currently in a windows comp. but was in our mac tower for awhile too.
Works great, good quality.