So, I get that larger f numbers like f/22 actually mean that it's a smaller opening and that smaller f number like f/2 is a big opening. I learned that thanks to a really helpful beginner video I just watched - https://www.youtube....h?v=fpdxMUWF0k0. But my question is this...WHY is the size of the aperture backwards from the numbers. Shouldn't f/22 be a big aperture since it's a big number and f/2 should be a small aperture since it's a small number???
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Why is aperture backwards?
Started by robertcarter687, Feb 26 2021 01:07 PM
#1
Posted 26 February 2021 - 01:07 PM
#2
Posted 27 February 2021 - 09:06 AM
This is because the Aperture is a RATIO and
1/2 (=0,5) > 1/4 (=0,25) > 1/8 (=0,125) ...
To find out more about why the f-number is a ratio and what it describes you can read the extensive article on Wikipedia
f-number - Wikipedia
1/2 (=0,5) > 1/4 (=0,25) > 1/8 (=0,125) ...
To find out more about why the f-number is a ratio and what it describes you can read the extensive article on Wikipedia
f-number - Wikipedia
- TBonz likes this
#3
Posted 27 February 2021 - 09:48 AM
This because the Aperture is a RATIO…
… and that ratio reflects the inverse square law proportions.
#4
Posted 01 March 2021 - 07:24 AM
Do not think of it as the smaller the diameter, the larger the #. Instead, think of it the opposite way...the larger the number, the larger the depth of field...
Other than that, see the answer above