The most important thing to know about these f-stop numbers is that, from each number to the next, the aperture decreases to half its size. This is what the aperture scale looks like (not to scale): A 50mm lens, with the aperture of f/8 = a lens opening 6.25mm wide (50mm/8).
A 50mm lens with the aperture of f/2 = a lens opening 25mm wide (50mm/2).Here are a couple of f-stop settings examples: For example, if you are shooting with a 200mm lens at f/4 the diameter of the aperture is 50mm. So to calculate the size of your aperture at a certain f-stop you have to divide the focal length by the fraction. The number following it is a fraction of the focal length. f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22.Īt this point, things get a little bit complicated and somewhat mathematical.This may seem confusing: Why a low number for the maximum aperture? The answer is simple, but first, you need to know the f-stops scale as follows:
#F stop camera manual#
You can adjust these settings in aperture priority and manual modes in your camera. The lower the number, the wider the aperture. On your camera, you’ll see ‘f/’ or ‘f’ followed by a number which denotes how wide the aperture is. The same goes for your camera’s aperture.īut why is it so important? Because the F-stop scale is what helps you to measure and understand the aperture size. In low light, the pupil is larger, letting in as much light as possible. To keep it short, the aperture blades, also known as a diaphragm in your lens work just like the pupil of the human eye.
Before we would jump right into it, it’s essential to understand how the aperture works.
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