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2. Light meter - Wikipedia

   en.wikipedia.org/wiki/Light_meter

   Use of a light meter for portrait cinematography in a Turkish music video set. A light meter (or illuminometer) is a device used to measure the amount of light.In photography, an exposure meter is a light meter coupled to either a digital or analog calculator which displays the correct shutter speed and f-number for optimum exposure, given a certain lighting situation and film speed.

3. Through-the-lens metering - Wikipedia

   en.wikipedia.org/wiki/Through-the-lens_metering

   In many advanced modern cameras multiple 'segments' are used to acquire the amount of light in different places of the picture. Depending on the mode the photographer has selected, this information is then used to correctly set the exposure. With a simple spot meter, a single spot on the picture is selected.

4. Nikon FM10 - Wikipedia

   en.wikipedia.org/wiki/Nikon_FM10

   The FM10 is a mechanically (springs, gears, levers) controlled manual focus SLR with manual exposure control. It is operable without batteries, which are only required (two S76 or A76, or one 1/3N) for the light metering information system.

5. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   Light meter, an instrument used to set photographic exposures. It can be either a lux meter (incident-light meter) or a luminance meter (reflected-light meter), and is calibrated in photographic units. Integrating sphere for collecting the total luminous flux of a light source, which can then be measured by a photometer

6. Selenium meter - Wikipedia

   en.wikipedia.org/wiki/Selenium_meter

   A selenium meter is a light-measuring instrument based on the photoelectric properties of selenium. The most common use of such light meters is measuring the exposure value for photography. The electric part of such a meter is an electromagnetic measuring instrument which is connected to the anode and cathode of a selenium photo cell that ...

7. Metering mode - Wikipedia

   en.wikipedia.org/wiki/Metering_mode

   On a number of cameras this is the default or standard setting. The camera measures the light intensity in several points in the scene and then combines the results to find the setting for the best exposure. The method of calculation can be different from camera to camera. The actual number of zones used varies widely, from several to over a ...