Characterized by the fact that it is thinner at the center and thicker at the side and forms the virtual image on the same side of the lens. (ZOOM OUT)

• Negative or Concave Lens (diverging lens)

• Positive or Convex Lens (converging lens)

First to introduce the use of lens in the camera

A medium or system which converge or diverge light rays passing through it to form an image.

• Apperture

• Shutter

• Lens

An essential part of the camera which is used to focus the light coming from the subject, it is mainly responsible for the sharpness of the image formed through which light passes during exposure

• Shutter

• Lens

• Aperture

Characterized by the fact that it is thicker at the center and thinner at the side which is capable of bending the light together and forms the image inversely.
(ZOOM IN)

• Positive or Convex Lens (converging lens)

• Negative or convex lens (diverging lens)

Inability of the lens to focus light passing the side of the lens producing an image that is sharp in the center and blurred at the side.

• Spherical aberration

• COMA

A kind of lens coma results in a star image near the outer edges of the viewing filed seeming to have comet - style tail scattering radially towards its optical axis (center)

• Negative coma

• Positive coma

Is the failure of light rays to focus properly after they pass through a lens or reflect from a mirror. Proper focus occurs when the light rays cross one another at single point.

Scattering radially away from its optical axis

• Negative coma

• Positive coma

The term Coma was coined 1733 by French mathematician ______

• Alexis Clairaut

• daniel barbaro