It's not a "guestimate". It's the definition of f-stop.Originally Posted by David Aimone
That's why it's written f/n, like f/2.8 or f/16.
f is the focal length and n is the numeric aperture.
- Leigh
Re: Using a single lens element
It's not a "guestimate". It's the definition of f-stop.
That's why it's written f/n, like f/2.8 or f/16.
f is the focal length and n is the numeric aperture.
- Leigh
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