ISO and File Size

ISO -International Organization for Standardization

• measures how sensitive the film is to light.
• When you are trying to take a picture in the dark you should use a high sensitivity.
  PROBLEM: with a high ISO the picture will have a lot of visual noise what makes the picture grainy and lower quality.
• You should use a low sensitivity when you are taking a picture in the brightness because the daylight already gives light to images.

File Size

• File Size includes Resolution.
  Resolution is the width and height of a picture.
• It also includes the pixels in the image.
  Having more pixels -> picture can be larger without getting grainy