![]() ![]() The shutter speed is the amount of time your image sensor is exposed to light. The next part is shutter speed sometimes called shutter angle. Smaller opening, less light.Īperture also controls the depth-of-field, which is the distance between the nearest and farthest objects that appear acceptably sharp in an image. Similarly, setting a lens that has a maximum aperture of f/1.4 to f/1.8 will let in about half as much light. A lens that has a maximum aperture of f/1.4 will let in about twice as much light as a lens that has a maximum aperture of f/2.8. A lower number denotes a greater aperture opening which allows more light to reach the film or image sensor. A lens typically has a set of marked f stops that the f number can be set to. The size of the aperture is usually specified as an f number. Almost all lenses on modern camera systems (except smartphones and many action cameras) have variable apertures and making the aperture smaller or larger will affect the amount of light that hits the sensor.Ĭamera lens with a large aperture. What is Aperture?Īn aperture is a hole or an opening through which light travels. We do need to consider your lenses' aperture. ![]() The amount of light loss from the glass is not something we have to think about right away. First, is the camera's lens and its aperture. In any given camera system, there are things that limit the amount of light that reaches the sensor. The amount of times per second the camera reads and records the image is the frame rate. The shutter is replaces with an image sensor on a DSLR camera. Video is a constant stream of exposures (called frames) any where from 24-60/second for "normal" looking video and 60-2500+/second for high speed video (slow motion). For a photo, you are dealing with one exposure or perhaps a burst of exposure at a time. Shorter exposure times results in a darker photo. Longer exposure times results in a brighter image and more motion blur. Both mechanical and electronic shutters function in a similar way. At the end of the exposure the camera discharges the pixels and takes a reading of each one. Each pixel charges up at the beginning of the exposure. With an electronic shutter, the camera reads the information from the sensor. However, smaller digital photo cameras, and almost all video cameras (except for ultra high-end cine cams), don't have a physical mechanism in front of this sensor and instead use an electronic shutter. Most digital photo cameras work in a similar way, like a DSLR. The mechanism that opens and closes, allowing light to hit the film is called the Shutter. You would literally expose the film to light. Then the mechanism would move back into place to block the light once again. When you took a photo, that mechanism would move and allow light to hit the film for a period of time. In the days of film cameras, there was some kind of mechanism that was physically in front of the film. In this tutorial, we'll dig in to how a digital video sensor works.Įxposure is the amount of light allowed to hit the image sensor of your camera while taking a photo or capturing video. Want better looking video? It's not all about the Ks, it's all about exposure. ![]()
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