What does underexposure mean?
Underexposure is a noun for an instance or condition of receiving too little exposure. In its most familiar sense, it refers to photography: a film, sensor, or image that receives too little light and therefore appears darker or less detailed than intended. The term can also be used more broadly for inadequate exposure to light, radiation, or another external influence. Underexposure may describe an unintended photographic fault, such as a dim picture, or a measurable condition, such as a plant receiving insufficient light. It is related to overexposure, which results from too much exposure rather than too little. In general discussion, the word can carry a negative connotation because it suggests inadequacy, invisibility, or a missed opportunity. It is chiefly a technical term and is usually uncountable, although plural forms occur. Its usefulness lies in naming a specific deficiency that might otherwise be described only vaguely as darkness or insufficiency.
nounThe condition of receiving or recording too little light, especially in photography, so that an image is darker than intended; more generally, a state of insufficient exposure to light, radiation, or another influence.
- Insufficient exposure to light in photography or imaging, resulting in an image that is darker or less detailed than intended.
- Insufficient exposure more generally, as to light, radiation, or another external influence.
"The camera settings were correct, but the storm clouds caused severe underexposure."
"The camera settings were correct, but the storm clouds caused severe underexposure."
"The audit found a serious underexposure of rural residents to public health warnings."
The plural is grammatically regular but uncommon; singular or uncountable usage is normally preferred.
"Several underexposures were visible across the contact sheet."
A picture can be perfectly sharp and still suffer underexposure: the details are there, but the light never got the memo.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of underexposure
Underexposure is an English compound of the prefix under-, meaning “below” or “insufficiently,” and the noun exposure. Exposure entered Middle English through Old French exposition, ultimately from Latin expositio, a noun derived from exponere, “to put forth” or “expose.” Related English words include exposition and expose, while underexposure uses under- to specify an amount below the required level.
Related word forms
How underexposure is actually used
Chiefly a technical term in photography and imaging, though it can also be used more broadly for inadequate exposure to an external influence. It is uncommon in everyday speech and is usually treated as uncountable.
Easily confused with underexposure
Underexposure results from too little light reaching a film or sensor, whereas overexposure results from too much light.