What Do f-stops And Pizzas Have In Common?
Did you ever wonder why camera lens makers picked such strange numbers for camera apertures? It all goes back to some math you learned in high school. Remember the formula for calculating the area of a circle? The area of a circle is equal to Πr2(3.141592654 . . . X the radius of the circle X the radius of the circle).
But you don’t need to know high school math formulas to remember lens aperture numbers or to know what size pizza to order.