Photography literally means 'writing with light'. Light's characteristics, including intensity, color temperature, and direction, fundamentally influence the aesthetic and technical aspects of photography and videography.
Color Temperature Explained
Measured in Kelvin, color temperature describes light's color output. Lower temperatures (2000–3000K) yield warm colors; mid-range (4000–5000K) is neutral, while higher temperatures (6000–7500K) produce cool colors, affecting mood and perception in visuals.
Exposure is determined by ISO, shutter speed, and aperture. ISO adjusts sensitivity to light, shutter speed controls duration of exposure, and aperture affects the depth of field and the amount of light entering the lens.
Dynamic range is the contrast between the darkest and lightest tones. Cameras have limits capturing this range, often lower than the human eye, which can lead to lost detail in highlights or shadows without careful lighting or post-processing.
Lighting Ratios Unveiled
Lighting ratio quantifies the relationship between key (main) light and fill (secondary) light, impacting the scene's mood. A high ratio creates dramatic, high-contrast images, whereas a low ratio gives a more even, subdued appearance.
The Inverse Square Law
This law states that light intensity falls off exponentially with distance. Doubling the distance between the light source and the subject reduces the illumination to a quarter, profoundly influencing the planning of lighting setups.
Polarizing filters control reflected light, reducing glare and enhancing colors. They can make skies appear deeper blue, manage reflections on non-metallic surfaces, and increase color saturation, crucial for landscape photography and videography.