ISO – The ISO is the camera's sensor light sensitivity, and it stands for International Organization for Standardization. Using higher ISO values increases the sensor light sensitivity, resulting in brighter images, but at the same time, it introduces more visible noise (grain) to the image. Shutter speed [1/s] – The shutter speed controls the time that the camera's shutter is open, allowing light to be captured by the camera's sensor. This time could be either a fraction of a second or more than one whole second. When using a long shutter speed (in other words, exposing the camera's sensor for a significant period of time) and objects are moving, this results in blurred objects along the direction of motion; this is also known as motion blur. This effect is commonly used to communicate the sense of speed or motion. On the other hand, when using a fast shutter speed value (a small fraction of time), you could almost eliminate the object's motion, even from fast-moving objects like cars driving past. F-stop – The f-stop value, also known as the f-number, is the ratio between the lens focal length and the aperture's diameter. The f stands for focal length and it is written as a fraction; in other words, think of an aperture of f/16 as 1/16 (one-sixteenth), or an aperture of f/8 is 1/8 (one-eighth). Using this same logic, an aperture of f/8 is larger than an aperture of f/16. For example, if you have a 50mm f/2.8 lens, and the f-stop value is set to f/4, then the diameter of the aperture blades (or diaphragm) in your lens will be 12.5 mm (50mm / 4), whereas setting the f-stop at f/16, the diameter will be only 3.5 mm (50mm / 16), and so on. Sensor width [mm] – This value describes the physical width of the camera's sensor. The sensor size can be measured in mm or inches. A full-frame sensor measures 36 x 24mm (W x h), and a four-thirds sensor ("4/3") measures 17 x 13mm (W x h). The ISO, Shutter speed, and F-stop values will only work if the Photographic exposure control is loaded in the Tone mapping section. |
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