- Each sensor chip has an array of photosites, each with a microlens that concentrates light through a filter into a potentiometer that records an electrical charge.
- Each photosite is sensitive to one of the primary colors: red, green or blue.
- Four photosites make up one picture element (pixel): one red, one blue and two green. Green gets the extra photosite because the other two colors are dominant.
- One megapixel is one million pixels.