Typical F stop numbers are:
F1.4, F.1.8, F2, F2.8, F4, F5.6, F8, F11, F16, F22
As they get smaller, the opening in the lens gets larger. And vice versa.
The reason why this happens is because these numbers represent fractions of the diameter of the lens. For example F2 means that the entire diameter of the lens gets divided by 2. If we have a 50mm lens and we set F2 in the aperture settings, the opening of the lens will become 50/2 = 25mm. If now we set F4, the opening becomes 50mm/4=12.5mm. So setting a higher F number we obtained a smaller opening.”
I chose this article because my favorite shots that I like the most are those where the background is out of focus and the only thing in focus is your subject. This could be an idea I would like to use in my final project. To read the rest of this article click here http://www.picturecorrect.com/tips/how-to-use-aperture-and-f-stops-in-photography/