through-the-lens meter: meaning, definition, pronunciation and examples
C1-C2Technical / Specialist
Quick answer
What does “through-the-lens meter” mean?
A light meter integrated into a camera that measures light intensity directly through the camera lens, using the same optical path as the image.
Audio
Pronunciation
Definition
Meaning and Definition
A light meter integrated into a camera that measures light intensity directly through the camera lens, using the same optical path as the image.
The metering system of a modern camera, which measures the light reaching the film or image sensor to determine correct exposure. It represents a significant evolution from handheld, separate light meters.
Dialectal Variation
British vs American Usage
Differences
Spelling: 'meter' vs. 'metre'. In both varieties, the device is a 'meter'. The spelling difference applies only to the unit of length (US: 'meter'; UK: 'metre'). The term is identical in usage.
Connotations
A highly technical term with no divergent cultural connotations between regions. It is purely descriptive of camera technology.
Frequency
Equally frequent within photography contexts in both the UK and US. The general public is unlikely to use the term; it is largely confined to enthusiasts and professionals.
Grammar
How to Use “through-the-lens meter” in a Sentence
use a through-the-lens meterequipped with a through-the-lens meterrely on the through-the-lens meterthe reading from the through-the-lens meterVocabulary
Collocations
Examples
Examples of “through-the-lens meter” in a Sentence
adjective
British English
- The through-the-lens metering system is more convenient.
American English
- This camera has a great through-the-lens metering mode.
Usage
Meaning in Context
Business
Rare. May appear in marketing copy for camera equipment.
Academic
Used in technical papers on photography, optics, or camera design history.
Everyday
Virtually never used. A general speaker would say 'the camera's light meter' or just 'the meter'.
Technical
The primary and correct context. Common in photography manuals, reviews, forums, and professional discussions.
Vocabulary
Synonyms of “through-the-lens meter”
Strong
Neutral
Weak
Vocabulary
Antonyms of “through-the-lens meter”
Watch out
Common Mistakes When Using “through-the-lens meter”
- Omitting the hyphens (e.g., 'through the lens meter').
- Incorrectly capitalising it as a proper noun.
- Confusing it with 'through-the-lens viewfinder' (a related but different concept).
FAQ
Frequently Asked Questions
TTL stands for 'Through The Lens'. It's the common abbreviation for 'through-the-lens meter' or 'through-the-lens metering'.
Yes, it is a specific type of light meter. All through-the-lens meters are light meters, but not all light meters (e.g., handheld ones) are through-the-lens meters.
The hyphens are used to link the words 'through', 'the', and 'lens' into a single compound modifier that describes the noun 'meter'. This clarifies that it is a meter that works through the lens, not a lens meter that is 'through' something.
The first practical TTL metering system for still cameras was introduced by the Japanese company Asahi (Pentax) in the 1960s, with the Spotmatic being a landmark model. It became the standard for SLR and later DSLR cameras.
A light meter integrated into a camera that measures light intensity directly through the camera lens, using the same optical path as the image.
Through-the-lens meter is usually technical / specialist in register.
Through-the-lens meter: in British English it is pronounced /ˌθruː ðə ˈlenz ˈmiːtə/, and in American English it is pronounced /ˌθru ðə ˈlenz ˈmiːt̬ɚ/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
THROUGH-THE-LENS: The light meter looks THROUGH the same LENS as your eye will see the final photo.
Conceptual Metaphor
TOOL-AS-EYE (The meter is a computational, measuring eye that shares the viewpoint of the photographic lens).
Practice
Quiz
What is the primary advantage of a through-the-lens meter over a handheld incident light meter?