An f-stop reading is a math equation for the focal length of a lens divided by the diameter of the entrance pupil (or aperture size). While most people think an f-stop is an actual reading of the amount of light that is coming through a lens it is actually far from it. The fractions can get down to the decimal place, buy if you are looking for a comprehensive chart check out this post on Hometown Sevier. For this reason many lenses give users the ability to make half, third, or even quarter steps between f-stops.
However, sometimes photographers and filmmakers want a very specific f-stop number that isn’t on this chart. Every lens will give users the ability to step between most of the f-stop numbers listed on this chart. If you move from a higher number (11) to a lower number (8) it is called “ stopping up“. If you move from a lower number (2.8) to a higher number (4) it is called “ stopping down“. Taking your f-stop from a lower number to a higher number decreases the amount of incoming light in half, moving two stops higher decreases incoming light by four and so on.
F STOP EXPLAINED FULL
The following chart shows us what f-stop numbers represent full stops: Knowing what numbers represent stops is very important to figuring out how much light is coming into your camera. In photography and video a stop is a step that either doubles the incoming light or cuts the incoming light in half. A lower f-stop number (1.2, 1.4, 1.8, 2) will let in more light compared to a higher f-stop number (8,11,16,22) which doesn’t allow very much light.Īlthough the actual f-stop numbers may seem arbitrary they actually stand for something important. Generally speaking an f-stop will quickly tell you how much light your lens is letting in.
F STOP EXPLAINED FREE
If you have any questions please feel free to ask in the comments below! What is an F-Stop?Īn f-stop is the numerical representation of the size of the lens aperture in relation to the focal length. In the following post we will take a look at every aspect of f-stops and how it relates to photography and video. Everything about f-stops run counterintuitive to how one would actually think they work, but have no fear. There is no lens concept more misunderstood than f-stop…and rightfully so. F-stops are crucial to understanding how a camera lens works.
0 kommentar(er)
