![]() This is rather tricky because it makes an exposure equation harder and entirely dependent on the lens used. To double the amount of light coming in through the aperture the opening size must be doubled, not the size of the aperture itself. The actual size of the aperture is only relevant to the size of the lens rather than a physical size. So an aperture of f/1.4 has a large opening, while f/32 would be a small opening. Aperture is measured in f/ stops, where the smaller the number the larger the aperture and the more light can be let in. It is comprised of a series of blades called a diaphragm. The aperture of your camera is the opening that allows light inside. ![]() The Exposure TriangleĪdjusting your exposure and getting the numbers right means learning what each numeric exposure value means so that you know whether you’re getting half as much light or double the light. Adjusting any of the exposure triangle will mean twice as much light captured or half as much depending on the adjustment. Each stop is double the exposure of the stop before. The correlation between the three is what an exposure stop is. Twice the exposure means twice as bright of an image. It doesn’t matter which of the three settings you’ve used, you’ll still get the same exposure on the film if it’s done correctly. The pattern here is that increasing any of the things – exposure time, or sensitivity to light affects the exposure and can be manipulated to create the same exposure with different settings. If the same experiment were done with two pieces of film being exposed for 1 second but one of the film strips was twice as sensitive the results would be the same as in the first experiment. If the same film were exposed in exactly the same way but for 2 seconds it would receive double the amount of light and be twice as bright. Back in the days of film, when the compounds coating the film were exposed they would imprint the amount of light allowed in that time e.g 1 second. Thankfully, cameras have numeric values assigned to each of these three things so that you can adjust relatively and expose correctly.Įxposure also relates to time. Each of these three is equally important and directly related. All three of these can compensate for each other so that if you need a faster shutter speed or a lower ISO you can adjust accordingly and still get a properly exposed image. This is made of three things – shutter speed, aperture, and light sensitivity ( ISO if you’re shooting digital). How much exposure your camera gets depends on something called the exposure triangle. If you go from 400 ISO to 200 ISO, you are reducing by one stop of light which is cutting them out of light in half. ![]() If you go for a shutter speed from 1/30 to 1/15, you are doubling the amount of light because in shutter speed one stop of light increase. For example: talking about f-stops, going from f-stop F/2 to f/2.8, you are decreasing by one stop of light, meaning that it is cutting the main light in half. ![]() Increasing by a stop of light, you are doubling the amount of light that comes into the camera, when decreasing by a stop of light, you are cutting the amount of light in half. A stop of light is a way to calculate light, how much is coming into the camera.
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