Photography is the art and practice of capturing images by recording light, either chemically on film or electronically on a sensor, using a camera or smartphone. It involves controlling light through the exposure triangle (shutter speed, aperture, and ISO) to create specific visual effects and moods. Key details of photography include its history, the core technical elements like light and exposure, and its diverse applications in art, science, and mass communication.  

What is Photography?

• Definition: The art and practice of creating photographs by recording light with a camera, which can be a traditional film camera, a digital camera, or even a smartphone. 
• Origin: The word “photography” comes from the Greek words “photo” (light) and “graph” (to draw), literally meaning “to draw with light”. 

Key Technical Aspects

• Light Control: At its core, photography is about controlling and capturing light. 
• The Exposure Triangle: This fundamental concept in photography involves three main settings that control the amount of light entering the camera:
  • Shutter Speed: Controls the duration the sensor is exposed to light. 
  • Aperture: Controls the size of the opening in the lens that lets in light, also affecting the depth of field. 
  • ISO: Controls the sensor’s sensitivity to light. 
• Image Sensor/Film: In digital photography, an electronic image sensor records light, while in traditional photography, a light-sensitive chemical film performs the same function.