F8

& Way back, printed guidelines on the inside of the old Kodak Film boxes, was to set your camera at F8 @ 125 for good sunny day results, etc etc.
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Over Exposed it’s bleached out & Under Exposed, nothing much comes in.
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It’s a bit like a Human Heart & Soul really!
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Difference being that an Under Exposed Heart, also lets nothing Out!!
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& how do you remain at F8 1/125 assuming its a sunny day ahead!!