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A camera lens mostly consist of an array of lenses (with or without an aperture mechanism to control the amount of light which passes through). To allow light to pass to the film or sensor, these are made of transparent materials mostly high quality glass. In some cameras specially cheap single use cameras even different types of plastics are used to make lens.

- Neeraj Sharma

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16y ago
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12y ago

In general terms, glass/plastic elements, a focus helix to move some elements in relation to others to permit focus, a similar mechanism to change focal length (zoom), an iris diaphragm to control the amount of light reaching the film/sensor and some means of connecting it to the camera body.

Digital SLR lenses also often include a computer chip, a focus motor and the required contacts to link both to the computer/sensors in the camera body.

It's almost impossible to be more specific as individual lenses are often either covered by patents or shrouded in secrecy. It's not a good idea to take one apart unless you can afford to lose it.

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Q: A camera lens is made up of what?
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