[toni-a]

Re your PS: yes, I agree, it's the rough estimate I'm doing too. I'll redo the test with slower shutters, in order to see where it's still possible to get a sharp shot without tripod.

“It obviously varies from person to person, some people are more stable / don't move as much as others, obviously.”

And unfortunately I'm noting I'm slightly getting more and more shaky...

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Or is it “shakier and shakier”?

As long as you stay awaynfrom coffee you will be fine