![]() But the measurements for the other two exposure controls (shutter speed and ISO) are relatively straightforward, so talking about them first will actually help you understand the aperture measurement. The “f-stop number” we are going to talk about here governs aperture size. You may recall that the three exposure controls on your camera are: shutter speed, aperture, and ISO. The f/number Measures One of Our Three Exposure Controls (Aperture)īefore we get into the specifics of the aperture settings, let me show you where this subject fits in with the rest of your photography. (Shutter at 1/160 aperture at f/16 ISO at 200). Since it was a bright day, a was still able to use a reasonably fast shutter speed even though I had to slow it down quite a bit to let more light into the camera to account for the smaller aperture. I wanted the wider depth of field because I wanted both the foreground grass and the lighthouse to be sharp. As detailed in this article, that is a very small aperture, which has two effects: (1) it lets less light into the camera, but (2) it creates a wider depth of field so that everything will be sharp. This photo was shot with my aperture set at f/16. I will do this in the context of measuring exposure, but also in the context of setting your depth of field. ![]() But, then, more importantly I will show you how you can apply them to your own photography. In this article, I’m going to explain to you what this number means and how it works. However, the concept of “f’-stops” doesn’t make sense at first glace and many are confused by it.īut understanding the figure is really pretty simple. It is important because it measures one of our three primary exposure controls: aperture size. These numbers, the 3.5 and the 5.A confusing number that beginning photographers face right away is the “f-stop” number. ![]() Some zoom lenses will detail something like f/3.5-5.6 on the lens barrel or 1:3.5-5.6 (below right). What is the aperture of a Nikkor lens?Īll lenses have a maximum aperture, and all NIKKOR lenses list the widest possible aperture on the lens barrel. Again, the reverse is true: using a high f/stop means that less light is entering the lens and therefore … What does it mean when you use a high f/stop?Īgain, the reverse is true: using a high f/stop means that less light is entering the lens and therefore the shutter will need to stay open a little longer which translates into a slower shutter speed. Using a low f/stop means more light is entering the lens and therefore the shutter doesn’t need to stay open as long to make a correct exposure which translates into a faster shutter speed. Lower f/stops give more exposure because they represent the larger apertures, while the higher f/stops give less exposure because they represent smaller apertures. It is calibrated in f/stops and is generally written as numbers such as 1.4, 2, 2.8, 4, 5.6, 8, 11 and 16. What is the difference between f/stops and aperture? The higher the f/stop-the smaller the opening in the lens-the greater the depth of field-the sharper the background. The lower the f/stop-the larger the opening in the lens-the less depth of field-the blurrier the background. Simply put: how sharp or blurry is the area behind your subject. How to tell if a lens is sharp or blurry? Again, the reverse is true: using a high f/stop means that less light is entering the lens and therefore the shutter will need to stay open a little longer … What is aperture in photography?Īperture refers to the opening of a lens’s diaphragm through which light passes. Why is the shutter speed higher at low f/stop? If you have any questions, remember to reply. (See Wikipedia : Aperture)There is an article about what is aperture in photography, please watch it together. How much light is on what part of the sensor at any one time.
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