![]() ![]() Although the exposure will be similar, the look and feel of your image can be completely different. Using a wide aperture (low f-number or f/stop) in combination with a fast shutter can provide the same exposure (amount of light that reaches the camera sensor) than using a narrow aperture (high f/stop) with slow shutter speed. The effect of Aperture on Shutter SpeedĪperture is significantly related to the Shutter Speed. If you understand the relationship between these elements, you will gain more control of the images you want to capture. When you increase the exposure for one of these three elements, you need to reduce it for one or both of the other pillars to maintain the same exposure. The other two pillars are the Shutter Speed and ISO. The higher the aperture number of f/stop, the smaller the lens opening, the sharper the background because of the greater depth of field.Īperture is one of the three pillars of the so-called exposure triangle the three settings that give you control over the exposure, the amount of light that hits the camera sensor to record an image.The lower the aperture number or f/stop, the larger the lens opening, the blurrier the background because of the less depth of field.The relation of aperture and Depth of FieldĪ very simple explanation of Depth of Field is how blurry or sharp the background is of the subject you focus on. To learn and see the differences in f/stops I would advise to experiment with different f/stops. A higher aperture is better for a high-light scenario while a lower aperture is better for low light scenarios. Examples of f/stops are: f/1.4, f/1.8, f/2.8, f/3.5, f/5.6, f/8, f/11, f/16, f/22.Ī higher aperture number (f/22) means less light is entering the camera because of the smaller lens opening (apertures) and a lower aperture number (f/2.8) means more light is entering the camera because of the larger apertures. The aperture is expressed in F-numbers or f/stops. The 'f' stands for the ratio of the focal length (focal stop) of the lens. ![]() In photography terms, this is called the Depth of Field. The size of the opening in the camera lens helps control the exposure or amount of light passing through the lens onto the image sensor.Īpart from controlling how light or dark an image is (the exposure), aperture also gives you control over how much of the image is in focus and how much of the background is blurry. It’s complicated but the f-number system actually takes away the chaos.What is Aperture in photography and how does it work?Īperture refers to the adjustable opening in a camera lens diaphragm. The splendor of using a ratio is, any lens operating at the same f-number as another lens, yields the same image brightness regardless of the dimensions (diameter or focal length), for an identical scene. If the working diameter is 2 inches and the focal length is 4 inches, then the f-number is 4 ÷ 2 = 2 (written as f/2.). For example if the class consist of 28 kids, then 12 boys to 16 girls is the breakdown (ratio is dimensionless).įor the camera lens: if the working diameter is 4 inches and the focal length is 4 inches, then the focal ratio (f-number) = 4 ÷ 4 = 1 (written as f/1 (f/1 is produces a very bright image). If I tell you the ratio of boys to girls in a 6th grade class is 3 boys for every 4 girls, I have given you a ratio that works independent of the number of students. This is true because a ratio is dimensionless. We are forced to fall back on a mathematical ratio that will take the chaos out of figuring out image brightness. Because these two factors are so interwoven, gauging image brightness is demanding. This higher magnification result is a larger but dimmer image of objects.Īnother way to say this, image brightness intertwines the working diameter and the focal length. In other words, the longer the focal length, the more the lens magnifies. The deed of magnifying to produce an image, takes its toll on image brightness. The longer the focal length, the more the lens magnifies. How bright this image will be is dependent on the brightness of the scene and the magnification realized by the lens. Because the lens operates much like a funnel in that it gathers light, the greater the working diameter of the lens, the brighter the projected image.
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