Question

what is a lens? give examples​

Answer 1

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A curved piece of glass or plastic used singly or combined in eyeglasses or an optical instrument (as a microscope) for forming an image by focusing rays of light.

Example:-

1) Canon: Canon 50mm f/1.8.

2) Nikon: Nikon 35mm f/1.8.

3) Olympus: Olympus 60mm f/2.8.

4) Samyang: Samyang 14mm f/2.8.

Answer 2

Explanation:

A curved piece of glass or plastic used singly or combined in eyeglasses or an optical instrument (as a microscope) for forming an image by focusing rays of light..