
A camera lens is made up of several elements, pieces of special glass ground to a specific curve according to computer calculations. Each element directs light in a particular way and corrects aberrations caused by other lens elements. A telephoto lens may have from 10 elements up to double that number.
Learn more about these with this tutorial and then go out there and take great photos! - View Tutorial »
submitted: 1 year and 1 days ago

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