If the shutter speed is written as 1”, that means your shutter will be open for one whole second.ĭarker shooting conditions will require you to use a slower shutter speed, such as 1/60, to let in enough light to fill the scene. You may see it written as a fraction (1/125) or a whole number (125), but either way, it refers to a fraction of a second unless the whole number is followed by a double quotation mark. Shutter speed is measured as a fraction of one second. By using a narrow aperture, such as f/22, your camera will select a slower shutter speed. By choosing a wide aperture, such as f/2, your camera will select a faster shutter speed to compensate for how much light is entering the lens. When shooting in Aperture Priority mode, your shutter speed will change as you change your aperture. If math isn’t your favorite subject, though, you can simply remember that the smaller the f-stop number, the wider the aperture, and the bigger the f-stop number, the smaller the aperture.īecause the aperture is in the lens and not the camera, different lenses may have varying f-stop ranges. Conversely, if you use an aperture of f/22 on the same lens, the aperture opening is 1/22 the size of your focal length, ie.
If you use a 50mm lens at an aperture of f/2, the aperture opening is ½ the size of your focal length, ie. Let’s take a look at a simple example to understand what these measurements mean. The exact size of the hole is measured in ‘f-stops’, or a fraction of the focal length of your lens. A Complete Beginner’s Guide to Understanding Aperture, Shutter Speed, and ISO.UV Photography Ready Camera Kit – Canon EOS T100.UV Photography Ready Camera Kit – Canon EOS RP.Everything You Need to Know About Infrared Photography.
#F STOP AND ISO HOW TO#