RESOLUTION and ISO

Resolution : A camera’s resolution capability is measured in megapixels. This measurement is based on the number of millions of pixels of image information that can be captured by the light-sensitive elements on the digital image sensor. Thus, a 15 megapixel camera is capable of capturing 15 million pixels of information.

SHUTTER and SHUTTER SPEED

Shutter

The shutter is a complicated mechanism that precisely controls the duration of time that light passing through the lens remains in contact with the digital image sensor. The camera’s shutter is activated by the shutter release button. Prior to the digital age, the shutter remained closed to prevent the film from being exposed.