The exposure value, as explained above, is the shutter speed and aperture combined. What does EV mean in photography? EV = Exposure Value. If you are taking a photo and it looks over-exposed (too bright), then you can use exposure compensation (EV+/-) to adjust the camera's exposure, to make the image darker or brighter. In auto mode, your camera looks at the scene and decides what ISO speed to use, what shutter speed to use, and what aperture to use. Continue reading to find out all about the different modes, or jump straight to a mode using the links below.Īuto | Program | Aperture | Shutter | Manual | TAv | Sv | Fv | Movie Auto Mode and Exposure Compensation Some cameras have a mode dial, as shown above and below, whereas others let you change the mode by pressing a Mode button, or by selecting the "Pro" mode (on a smartphone). There are alternative triangles available.
Continue reading to find out more about the different modes, and how changing them can change the results you get from your camera. Hopefully this has helped understand how a camera takes a photograph. If you're setting these manually, you can increase the ISO speed to make the camera more sensitive to light, (and in return you'll also get more noise in images), with a higher ISO speed you can use a faster shutter speed (to freeze motion), or use a smaller aperture (such as f/11, or f/16) to get a wider depth-of-field where more of the scene will be in focus. Shutter speed = the length of time the shutter is open ISO Speed = the image sensor's sensitivity to lightĪperture = lens aperture opening, allowing light through This can be either automatically set by the camera, or you can set these manually if your camera has the controls available. Have a look at the "Exposure Triangle" below: To take a photo, a camera must set the aperture (of the lens), the shutter speed, and the ISO speed. If you were using film, this would be fixed, by your choice of film speed. In addition, how sensitive the sensor is to light is controlled by the ISO speed. The amount of light that reaches the sensor is controlled in part by the aperture of the lens. The shutter speed is determined by the amount of light that is needed for a correct exposure. A photograph's exposure is made by the camera sensor (or film) being exposed to light for a specific amount of time. To help understand your camera more, you'll benefit from learning what the different modes do on your camera, including PASM.īut first we need to start with some basics. Whether you have a compact camera, a mirrorless camera, a DSLR or even a smartphone, if it has manual controls, then you'll want to understand the different modes available.
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