21 photography facts you probably never knew

 
We’ve put together 21 fascinating, puzzling, and bizarre facts about photography that you probably never knew. If the next pub quiz you attend asks you what was the most expensive camera ever sold, how big the largest ever photograph was, or how many Hasselblads there are on the moon, you’ll be glad you read this post. (And if you win, you owe us a drink.)

Biology and Photography

The f-number of the human eye varies from about f/8.3 in brightly lit conditions, to about f/2.1 in dark conditions.
Source: Wikipedia
To work out the focal length of the human eye, you would need to take into account the light-reflecting properties on liquids in the eye.
Source: Wikipedia
F-numbers are actually written as they are due to human biology, or more specifically, due to the logarithmic nature of human perception. I can sense your eyebrows raising in confusion. The story behind f-numbers actually begins in ancient Greece and has its roots in the brightness of stars. Even more confused? You might want to read this post…
Source: PetaPixel
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21 photography facts you probably never knew