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Through-the-lens metering

Index Through-the-lens metering

In photography, through-the-lens (TTL) metering refers to a feature of cameras whereby the intensity of light reflected from the scene is measured through the lens; as opposed to using a separate metering window or external hand-held light meter. [1]

39 relations: Camera, Camera lens, Canon EOS, Canon EOS flash system, Canon F-1, Canon Pellix, Exposure (photography), Flash (photography), Fujifilm, Image sensor, Leica Camera, Leicaflex / SL / SL2, Light meter, Metering mode, Minolta Maxxum 9000, Nikon, Nikon F3, Nikon FM, Nikon Speedlight, Olympus OM-2, Olympus OM-3, Pellicle mirror, Pentamirror, Pentaprism, Pentax, Pentax LX, Pentax Spotmatic, Photographic film, Photography, Photokina, Point-and-shoot camera, Pre-flashing, Single-lens reflex camera, Sony, Sony SLT camera, Through-the-lens metering, Topcon RE Super, Zenit (camera), Zone System.


A camera is an optical instrument for recording or capturing images, which may be stored locally, transmitted to another location, or both.

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Camera lens

A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.

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Canon EOS

Canon EOS (Electro-Optical System) is an autofocus single-lens reflex camera (SLR) camera series produced by Canon Inc..

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Canon EOS flash system

Canon Inc.'s EOS flash system refers to the photographic flash mechanism used on Canon's film (35mm and APS) or digital EOS single-lens reflex cameras.

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Canon F-1

The Canon F-1 is a 35 mm single-lens reflex camera produced by Canon of Japan from March 1971 until 1976's introduction of the mildly updated F-1n.

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Canon Pellix

The Canon Pellix is a manual focus camera released in 1965 that uses a semitransparent stationary reflex mirror behind which a metering cell is raised during the reading.

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Exposure (photography)

In photography, exposure is the amount of light per unit area (the image plane illuminance times the exposure time) reaching a photographic film or electronic image sensor, as determined by shutter speed, lens aperture and scene luminance.

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Flash (photography)

A flash is a device used in photography producing a flash of artificial light (typically 1/1000 to 1/200 of a second) at a color temperature of about 5500 K to help illuminate a scene.

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, trading as Fujifilm (stylized as FUJiFILM), or simply Fuji, is a Japanese multinational photography and imaging company headquartered in Tokyo.

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Image sensor

An image sensor or imaging sensor is a sensor that detects and conveys the information that constitutes an image.

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Leica Camera

Leica Camera AG is a German company that manufactures cameras, lenses, binoculars, rifle scopes and ophthalmic lenses.

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Leicaflex / SL / SL2

The Leicaflex was the first series of 35mm single-lens reflex (SLR) cameras manufactured by Leitz.

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Light meter

A light meter is a device used to measure the amount of light.

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Metering mode

In photography, the metering mode refers to the way in which a camera determines exposure.

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Minolta Maxxum 9000

The Minolta 9000 AF is a professional Single-lens reflex autofocus camera, introduced by Minolta in August 1985.

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(or), also known just as Nikon, is a Japanese multinational corporation headquartered in Tokyo, Japan, specializing in optics and imaging products.

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Nikon F3

The Nikon F3 was Nikon's third professional single-lens reflex camera body, preceded by the F and F2. Introduced in 1980, it had manual and semi-automatic exposure control whereby the camera would select the correct shutter speed (aperture priority automation). The Nikon F3 series cameras had the most model variations of any Nikon F camera. It was also the first of numerous Nikon F-series cameras to be styled by Italian designer Giorgetto Giugiaro, and to include a red stripe on the handgrip – a feature that would later become (with variants of stripes and various other shapes) a signature feature of many Nikon cameras. The F2AS was a current model when the F3 was introduced, and for a while both were sold concurrently. The earlier Nikons had developed such a sterling reputation for extreme ruggedness and durability that many Nikon F and F2 owners were initially reluctant to transition to the new F3 from the F2 series. The F3 was superseded by the F4 in 1988 and the F5 in 1996. Despite being superseded by the newer cameras, it remained in production through to 2001, with over 751,000 F3s produced through September 1992. It continues to be the longest running professional grade Nikon SLR. Long after production ceased, new bodies in boxes were available throughout the world, so an exact production number is not readily available.

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Nikon FM

The Nikon FM is a mechanically operated, interchangeable lens, 35 mm film, single-lens reflex (SLR) camera.

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Nikon Speedlight

Speedlight is the brand name used by Nikon Corporation for their photographic flash units, used since the company's introduction of strobe flashes in the 1960s.

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Olympus OM-2

The Olympus OM-2 is a single-lens reflex film system camera produced by Olympus of Japan.

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Olympus OM-3

Olympus OM-3 The Olympus OM-3 is a manual camera without automatic exposure modes, and an entirely mechanical shutter.

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Pellicle mirror

A pellicle mirror (diminutive of pellis, a skin or film) is an ultra-thin, ultra-lightweight semi-transparent mirror employed in the light path of an optical instrument, splitting the light beam into two separate beams, both of reduced light intensity.

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A pentamirror is an optical device used in the viewfinder systems of various single-lens reflex cameras instead of the pentaprism.

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A pentaprism is a five-sided reflecting prism used to deviate a beam of light by a constant 90°, even if the entry beam is not at 90° to the prism.

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is a brand name used primarily by Japanese multinational imaging and electronics company Ricoh for cameras, sport optics (including binoculars and rifle scopes), and CCTV optics.

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Pentax LX

The Pentax LX is a 35 mm Single-lens reflex camera produced by Pentax in Japan.

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Pentax Spotmatic

The Pentax Spotmatic refers to a family of 35mm single-lens reflex cameras manufactured by the Asahi Optical Co.

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Photographic film

Photographic film is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals.

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Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.

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Photokina (rendered in the promoters' branding as "photokina") is a trade fair held in Europe for the photographic and imaging industries.

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Point-and-shoot camera

A point-and-shoot camera, also known as compact camera, is a still camera designed primarily for simple operation.

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In cinematography and photography, pre-flashing is the exposure of the film or other photosensor to uniform light prior to exposing it to the scene to be imaged.

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Single-lens reflex camera

A single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence "reflex" from the mirror's reflection) that permits the photographer to view through the lens and see exactly what will be captured.

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is a Japanese multinational conglomerate corporation headquartered in Kōnan, Minato, Tokyo.

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Sony SLT camera

Single-Lens Translucent (SLT) is a Sony proprietary designation for Sony Alpha cameras which employ a pellicle mirror, electronic viewfinder, and phase-detection autofocus system.

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Through-the-lens metering

In photography, through-the-lens (TTL) metering refers to a feature of cameras whereby the intensity of light reflected from the scene is measured through the lens; as opposed to using a separate metering window or external hand-held light meter.

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Topcon RE Super

The Topcon RE Super, or Beseler Topcon Super D in USA, was launched by Tokyo Kogaku KK in 1963 and manufactured until 1971, at which point it was upgraded to the Super D and again to Super DM the following year.

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Zenit (camera)

Zenit (Зени́т) is a Russian (and formerly Soviet) camera brand manufactured by KMZ in the town of Krasnogorsk near Moscow since 1952 and by BelOMO in Belarus since the 1970s.

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Zone System

The Zone System is a photographic technique for determining optimal film exposure and development, formulated by Ansel Adams and Fred Archer.

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[1] https://en.wikipedia.org/wiki/Through-the-lens_metering

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