Exposure is the amount of light received the film. It's controlled by the shutter and how long and wide you leave the aperture open. The exposure created by the aperture, shutter speed, and sensitivity combination can be represented by its exposure value or EV. Overexposure- too much light and the picture comes out white, underexposure- too little light and the picture comes out black
http://www.dpreview.com/learn/?/key=exposure
Shutter speed is the amount of time the shutter remains open for light to hit the sensor. Shutter speed is measured in seconds or in fractioned seconds. The very fast shutter speed "freezes" fast moving objects. The very slow shutter speed "freezes" moving objects.
http://www.digicamhelp.com/camera-features/advanced-settings/shutter-speed.php
f-stop or f-number is a measurement of the size of the aperture. The larger the f-stop the smaller the aperture is. The smaller the f-stop the larger the aperture. Th f-stop is calculated by dividing the focal length(light path) by the diameter of the aperture.
http://courses.washington.edu/p116as02/fstopexplanation.html
http://www.mediacollege.com/glossary/f/f-stop.html
Each step in size is called a stop. If you change from an aperture f/20 to f/21 then you have increased your aperture one stop. Each step in speed for the shutter is also known as a stop.
There is a reciprocal relationship between the shutter speed and the aperture. To maintain the same exposure value, if you change one you’ll need to change the other in the opposite direction. If you add light with the shutter, you need to take away light with the aperture. In photography, we call this reciprocity.
Auto automatically sets the aperture and the shutter speed. Programmed auto allows you to set the exposure. Shutter priority mode allows you to set the shutter manually and the camera matches the aperture to this setting. Aperture priority mode allows you to set the aperture and it automatically sets the shutter to match this. The Manual mode allows the photographer to be in total control of the aperture and shutter settings.
Metering is
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1 comment:
Some ideas for further research.
What are sample shutter settings?
What are some sample F-Stops? How is an F-Stop calculated?
What is a "Stop" (for shutter and for aperture).
What is the relationship between Shutter and Aperture? (Specifically based off of the settings you've talked about)
What camera settings allow you to set the aperture and shutter.
What is metering? How does the camera meter?
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