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Parts of a
Lens is the image -forming device on a camera.
There are three types. The normal, wide angle, and telephoto lens.
The lens' focal length (point at which rays focus through the lens) determines the size of the image that will be produced on the film.
The speed or light-gathering power of lens is indicated by the "f" number called aperture. The lower the "f" number the more light it lets through making it faster.
The diaphram determines the correct film exposure in the amount of light allowed to pass through the lens.
Most cameras use an iris type diaphram which has a number of thin blades which are on top of each other. They can be moved by a lever which then varie the size of the lens opening.
The shutter is the exposure control factor and is a mechanical device that controls how long the light is allowed to pass through the lens and fall on the film.
The exposure control measures the light intensity and indicates what aperature and shutter speed to the film depending on the light conditions.
The view finder defines the area covered by whatever lens is in use on the camera.
Refraction & the Camera
Camera lens uses refraction to focus light on the film.
This makes it possible to design a curved piece of glass in the camera (which are the lens) that will focus a parallel beam to a point. The light is then refracted.
HOW DO CAMERA PARTS WORK?
HOW DOES REFRACTION CONNECT TO THE CAMERA?