Ultimate Stupid Question

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windoze
windoze Veteran Member • Posts: 9,599
Ultimate Stupid Question

my camera's lens wide open is f/2.4 which is where I leave it. But because I always zoom out the images are always at f/4.  What difference and or consequence does it make if I set the lens to f/4 in the 1st place.   Any laymans explanation would be greatly appreciated.

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Sony RX10 IV
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Bob
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