Exposure (photography)
In photography, exposure is used to mean two things. Photographic film or sensors have a certain senitivity. That means that a certain amount of light needs to be able to reach the film or sensor, before the image is correctly exposed. It is measured in units of lux-seconds (symbol lx ⋅ s). An exposure can also refer to a photo exposed that way.
Exposure (photography) Media
White chair: Deliberate use of overexposure for aesthetic purposes
- Auto vs manual settings comparison, barn and trees.jpg
Two similar images, one taken in auto mode (underexposed), the other with manual settings
- Houseoltreilcolle.JPG
Buildings and trees photographed with an autoexposure time of 1/200 s
- Runeberginkatu, Helsinki, in bright sunlight.jpg
A street view of Taka-Töölö, Helsinki, Finland, during a very sunny winter day. The image has been deliberately overexposed by +1 EV to compensate for the bright sunlight and the exposure time calculated by the camera's program automatic metering is still 1/320 s.
- Kew fountain (long exposure).jpg
A 1/30 s exposure showing motion blur on fountain at Royal Botanic Gardens, Kew
A 1/320 s exposure showing individual drops on fountain at Royal Botanic Gardens, Kew
- Long exposure at the fair.jpg
A fair ride taken with a 1/3 s exposure
- Blown-out highlights.jpg
Example image exhibiting blown-out highlights. Top: original image, bottom: blown-out areas marked red
