The metre (Commonwealth spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure", and cognate with Sanskrit mita, meaning "measured" ) is the base unit of length in the International System of Units (SI). A light meter can read the ambient light in a scene, or the direct light from a light source and calculate the correct shutter speed and aperture values required to capture an accurate exposure. Extech LT300. It is affected by the color or brightness of the subject itself. Definition of light meter in the Definitions.net dictionary. How to use meter in a sentence. Light meter with double molded housing and large backlit display with 40-segment bar graph. English Wikipedia - The Free Encyclopedia. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s –1, where the second is defined in terms of the caesium frequency Cs. Light Meter Digital and Analog display of light … It is equal to approximately 39.37 inches in the British Imperial and United States Customary systems. We use cookies to enhance your experience on our website, including to provide targeted advertising and track usage. Extech LT10. Meaning of light meter. Definition of Meter. Definition: Instrument designed to measure intensity of light or luminance of subject. Wikipedia Dictionaries. To do this, the photographer will shield the light meter from the fill light or potentially turn off the lights that aren’t being measured at the moment. Definition of light-meter noun in Oxford Advanced Learner's Dictionary. By default, the camera meter looks at the light levels in the entire frame and tries to come up with an exposure that balances the bright and the dark areas of the image. Translate light meter into Spanish. Reflected Light Meter Reflected Light Meter is a specific light meter configuration (or type) that directly measures the reflected light from a subject and provides an exposure value in f-stops or foot candles. Essentially, meter is the basic rhythmic structure of a line within a poem or poetic work. REFLECTED LIGHT METER READING VARIATIONS There are variations of light meter readings used to provide accurate light meter readings of different types of scenes.. This application changes Jaz into a dedicated light meter allowing users to measure calibrated absolute irradiance without any need for an external computer. light meter meaning: a device for measuring how much light there is, especially when taking a photograph. The light meter thinks the sky is the most important part, and exposes correctly for that, leaving the person a dark silhouette. An exposure meter (short form meter, commonly light meter) is an instrument that measures light and can calculate exposure settings, taking account of film or sensor sensitivity (ASA/DIN). Easy, eh? Up to 20 data points can be recorded automatically at a variety of … Pocket Series Light Meter Compact, One-Button Operation Light Meter. The lux (symbol: lx) is the SI derived unit of illuminance, measuring luminous flux per unit area. Metre (m), also spelled meter, in measurement, fundamental unit of length in the metric system and in the International Systems of Units (SI). Definition of light meter in English: light meter. This is the type of meter that is used to measure flash’s intensity. EXPLORE. From Longman Dictionary of Contemporary English light meter ˈlight ˌmeter noun [countable] TCP an instrument used by a photographer to measure how much light there is Examples from the Corpus light meter • A light meter can be used to assess the level of lighting present. Accurately Measure UVA and UVB Light UV light intensity appears on the large backlit display in either µW or mW/cm² while the small lower display simultaneously shows minimum, maximum, average and recorded data. Whilst the two terms "light meter" and "exposure meter" are often used interchangeably, there is a difference: Light meter Definition from Encyclopedia Dictionaries & Glossaries. This will then allow the photographer to correctly expose the person. Define Light meter. Definition agreed by the 26th CGPM (November 2018), implemented 20 May 2019: The metre, symbol m, is the SI unit of length. Define light meter. A light meter is a device used to measure the amount of light. Define light meter. light meter synonyms, light meter pronunciation, light meter translation, English dictionary definition of light meter. Definition of light meter written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. Information and translations of light meter in the most comprehensive dictionary definitions resource on the web. light meter - photographic equipment that measures the intensity of light. An analogy to help you understand the light meter. By definition a good lux meter hence CANNOT see infrared or ultraviolet light, because a good lux meter only responds to visible light. The histogram is of course affected by subject colors, how those colors reflect light.It only shows how the data result actually came out, but without any idea how it ought to be.. EXPLORE. It is equal to one lumen per square metre. A ‘light meter’ is a handheld device that used measure or ‘meter’ light. The SI unit symbol is m.The metre is defined as the length of the path travelled by light in a vacuum in 1 / 299 792 458 of a second. means a device that measures the amount of light energy falling on a given surface. light meter. An instrument for measuring the intensity of light, used chiefly to show the correct exposure when taking a photograph. Reflective metering measures the amount of light hitting the subject and bouncing back to the meter (which in many cases will be in your camera). n. See exposure meter. Matrix / Evaluative Metering Matrix Metering or Evaluative Metering mode is the default metering mode on most DSLRs. The exposure meter built into your camera is a reflective light meter, meaning that it measures light reflected from a subject. Meter definition is - systematically arranged and measured rhythm in verse:. exposure meter, photometer. * Many varieties of light meters exist, designed to do slightly different jobs and based on different properties of light. cytophotometer - a photometer that can be used to locate and identify chemical compounds in a cell by measuring the intensity of the light that passes through stained sections of the cytoplasm. With ISO/ASA 100 speed film you expose with an Exposure Value (EV) equal to the Light Value (LV). An interesting effect of the definition of the meter this way is that it fixes the speed of light in a vacuum to the exact value of 299,792,458 m/s. Exposure Value, or EV, varies from LV, or Light Value, depending on your film speed. • For me, it is the accuracy of the Nikon light meter that really sets it apart. In photography, a light meter is often used to determine the proper exposure for a photograph. So, if the subject is dark, less light bounces back to the meter. light meter synonyms, light meter pronunciation, light meter translation, English dictionary definition of light meter. Meter is a literary device that works as a structural element in poetry. The other type of exposure meter, incident, measures light that falls directly onto the meter. Whether it was a steak, some pork chops, or even just a couple hamburgers – you likely had a vision in your mind of what the finished product would be. n. See exposure meter. EV = LV at ISO 100. Before I get into a discussion about how the light meter works, think about the last time you cooked some meat on the grill. Incident Light Meters A Histogram is not a light meter A histogram is not a light meter. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. By using exposure compensation, you can tell the camera to take the metered exposure and make it brighter by a chosen amount. Lux meters, sometimes called light meters, measure the intensity of illumination as distinguished by the human eye. Your meter will do this for you, but you can do it in your head, too, if you forget your meter. The meter is the basic unit of length in the SI system of units. noun. Pronunciation /ˈlÄ«t ˌmēdər/ /ˈlaɪt ˌmidər/ See synonyms for light meter. The meter is defined to be the distance light travels through a vacuum in exactly 1/299792458 seconds. Reflective metering. Did You Know? Learn more. light meter in Photography topic. Yes, I'd like to receive Word of the Day emails from YourDictionary.com Meter functions as a means of imposing a specific number of syllables and emphasis when it … This value does not correlate to an objective value of energy radiated or reflected, as different wavelengths within the visible spectrum are perceived with varying sensitivity by the eye, and lux meters evaluate light intensity in consideration of this variable. 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