Questions and Answers
What determines exposure in photography?
Shutter speed, lens F-number, and scene luminance
What unit is exposure measured in?
Lux-seconds (lx ⋅ s)
What does a long exposure in photography refer to?
A single, long shutter cycle to gather enough dim light
What is radiant exposure measured in?
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What is a multiple exposure in photography?
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Study Notes
Exposure in Photography
- Exposure is determined by the combination of aperture, shutter speed, and ISO (sensitivity of the image sensor)
- Exposure is measured in stops, which represent the doubling or halving of the amount of light that reaches the image sensor
Types of Exposure
- A long exposure refers to a shutter speed that is longer than normal, often used to create a sense of motion, blur, or to capture low-light scenes
- Radiant exposure is measured in joules per square meter (J/m²) and represents the amount of energy from electromagnetic radiation (such as light) that falls on a surface
Multiple Exposure
- A multiple exposure in photography refers to a technique where two or more images are superimposed on a single frame, creating a layered or ghostly effect
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