All cameras from the simplest to the highest of high tech share some basic features.
Lens. The lens is made up of layers of glass which are each shaped to focus incoming light onto a surface used to expose the image.
Light sensitive medium. In digital cameras this is a sensor – which comes in a variety of types but all basically change light into an electrical signal. In film cameras, the exposure takes place on, you guessed it, film.
A variably sized hole call the aperture. Located in the lens, the aperture control is a series of blades which changes the amount of light passing through lens. The aperture’s basic unit of measurement for how much light is getting through is the “ƒ Stop.” A whole Stop change in aperture lets in either half as much light or twice as much light. On your lens (or in the view finder, or maybe on an LCD menu on your camera) you typically see numbers like ƒ1.8, ƒ2.8, ƒ4, ƒ5.6, ƒ8, ƒ11, ƒ16, and ƒ22.
Lens. The lens is made up of layers of glass which are each shaped to focus incoming light onto a surface used to expose the image.
Light sensitive medium. In digital cameras this is a sensor – which comes in a variety of types but all basically change light into an electrical signal. In film cameras, the exposure takes place on, you guessed it, film.
A variably sized hole call the aperture. Located in the lens, the aperture control is a series of blades which changes the amount of light passing through lens. The aperture’s basic unit of measurement for how much light is getting through is the “ƒ Stop.” A whole Stop change in aperture lets in either half as much light or twice as much light. On your lens (or in the view finder, or maybe on an LCD menu on your camera) you typically see numbers like ƒ1.8, ƒ2.8, ƒ4, ƒ5.6, ƒ8, ƒ11, ƒ16, and ƒ22.
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