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How important is it that aperture and shutter speed are interconnected?
Wiki User
∙ 15y ago
Aperture (the physical size of the lens opening) and shutter speed together control the amount of exposure, the total light that is allowed to strike the film or sensor. You'd want the aperture and shutter speed interconnected to control either motion stopping power or depth of field (you have to choose one over the other).
For example: given a certain ISO and a fixed light level, assume that you or the camera have metered the scene and the amount of exposure is correct at, let's say, 1/125 second (shutter) at f/8.0 (aperture). Your shutter speed and aperture can be interconnected to get equivalent exposures at 1/250 @ f/5.6; or 1/500 @ f/4.0; or going the other way you'd get an equivalent exposure at 1/60 @ f/11 or 1/30 @ f/16.
All the exposures listed are equal, even though they all sound different. The aperture and shutter are interconnected in that, as the aperture gets larger to admit more light, the shutter speed gets faster to limit the amount of time the light is admitted.
So why bother? Because there are two other factors involved. One is what we call depth of field, which is defined as the area in front of and behind a subject focused upon that appearsalso to be sharp. Depth of field increases with smaller apertures (the f/8.0, f/11 and f/16 of the example). So if you're shooting a very tight close-up of a flower, where depth of field is very limited due to close focus, you might choose the 1/30 @ f/16 option, but at that slow shutter with a close up subject you might also want to mount the camera on a tripod.
But let's say you're shooting skateboarders at the park. You're focused fairly far away so depth of field isn't terribly important, and in fact you'd want the depth of field relatively shallow to emphasize the skateboarder in the air, where you'd be much more likely to freeze him at 1/500 @ f/4.0. (Remember that these are just arbitrary examples.)
On the other side of the coin, you don't want the shutter and aperture to be interconnected when the light level is changing, or the ISO, or both. Your hand held or in camera meter will select a different combination of shutter and aperture for a correct exposure, and if you have the option of controlling both, you can still select for greater depth of field or motion stopping.
Wiki User
∙ 15y ago
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What is aperture priority in photography?
Aperture priority lets you set the aperture you want and the camera sets the shutter speed for you. You use it when you want to control depth of field. Shutter priority lets you set the shutter speed you want and the camera sets the aperture for you. You use it when you want to control how motion is rendered in the photograph. Program mode sets both shutter speed and aperture for you. Use it when you are not concerned with aperture or shutter speed control.
What is meant by Aperture priority?
Aperture Priority has the camera set the shutter speed for you allowing you to set the aperture and it will set what shutter speed it thinks is best for your current light situation.
What are you setting when you set the shutter speed?
The amount of time that the shutter remains open - allowing light to pass through it to form the image. Generally - a lower shutter speed would be combined with a smaller aperture and a higher shutter speed with a larger aperture to correctly expose the image.
What do the shutter speed and aperture sizes both control?
light
Why is shutter speed used?
The shutter speed setting controls the picture exposure, or how dark or bright the picture will be. Wikipedia has some very good information on shutter speed and aperture.
What is aperture priority of digital camera?
Exposure, in digital or film photography, is determined by aperture and shutter speed. On a manual camera, the user selects both values.On an automatic camera, there are four possibilities:Manual mode. User selects both aperture and shutter speed.Shutter priority. User picks the shutter speed and the camera adjusts the aperture to ensure proper exposure.Aperture priority. User picks the aperture and the camera adjusts the shutter speed to ensure proper exposure.Program mode. The camera selects both values.
How would you set the ISO for shutter speed and aperture for correct exposure on a rainy day and why?
The ISO speed, shutter, and aperture are all interconnected. There is never necessarily one "correct" setting for all 3. However, if you're not shooting on a tripod, you probably want to set your shutter speed to 1/60 to reduce camera shake. To eliminate grain, you may want to keep your ISO below 400. It may be cloudy on a rainy day, so you may be able to shoot at f/8 or f/11. Of course, on most digital cameras you could select a shutter priority (meaning the camera will adjust the aperture for correct exposure at a shutter speed of 1/60) and then set your ISO to 400. The camera will automatically meter the scene and set the aperture correctly.
How do aperture and shutter speed work together to achieve proper exposure in a photograph?
Well when the aperture is wide enough and shutter speed is not fast enough then there will be enough amount of light for the photo to be taken and looking good enough.
If you are changing the shutter speed why is the depth of field being affected?
Usually, one would change the aperture to compensate for the change in shutter speed in order to keep the level of exposure the same. Changing the aperture affects the depth of field.
How exposure system works and affect the image?
Exposure is the combination of aperture and shutter speed. Aperture (measured in f-stops) determines the amount of light that will enter your camera. Shutter speed (measured in seconds) determines the amount of time that the shutter will stay open to allow light to enter.
What two variables on a camera control the exposure of the film?
shutter speed and lens aperture
What element is used in high speed photography?
High shutter speed and fast lens/Big open aperture.
