long-exposure
UK[ˌlɒŋ ɪkˈspəʊʒə]US[ˌlɔːŋ ɪkˈspoʊʒər]
n
A photographic technique where the camera's shutter is left open for an extended period, allowing more light to reach the sensor or film and creating effects such as blurred motion or light trails.
adj
Of or relating to a photograph taken using this technique.
Morpheme Breakdown
long
exposure
long
extended in time
exposure
subjecting film/light to light
Etymology
The compound term 'long-exposure' is a modern technical coinage in photography, combining two established English words. 'Long' originates from the Proto-Germanic langgaz, carrying the enduring sense of extended duration. 'Exposure' derives from Latin exponere, meaning 'to put forth' or 'to reveal', which itself is formed from ex- (out) and ponere (to place). In its photographic application, 'exposure' specifically refers to the act of subjecting a photosensitive surface to light. Thus, the term's literal logic is perfectly transparent: it describes the action (exposure) of revealing an image over an extended (long) period of time, a meaning that directly reflects its constituent parts.
Analysis
Structure: long (extended in time) + exposure (subjecting film/light to light)
- long: From Old English lang, long, of Germanic origin; related to Dutch lang and German lang. Functions as an adjective describing duration.
- exposure: From the base of Latin exponere (to put out, expose), via expos- (past participial stem) + the English noun-forming suffix -ure. The core morpheme expos(e) functions as a verb root meaning to lay open to light or view.
Examples
The photographer used a long-exposure to capture the smooth flow of the waterfall.
This stunning image of star trails is a classic example of long-exposure photography.
For a clear long-exposure shot at night, you will need a sturdy tripod.