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  2. Canon EOS flash system - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS_flash_system

    Evaluative-Through The Lens (E-TTL) is a Canon EOS flash exposure system that uses a brief pre-flash before the main flash in order to obtain a more correct exposure. Unlike TTL and A-TTL metering, which use a dedicated flash metering sensor mounted in the base of the mirror box, E-TTL uses the same evaluative metering sensor used for ambient ...

  3. Flash comparison - Wikipedia

    en.wikipedia.org/wiki/Flash_comparison

    E-TTL II [nb 5] yes yes 3.5 Yes (only E-TTL/i-TTL slave) Can update firmware over USB, High Speed Sync Yes Metz mecablitz 58 AF-1 digital [10] 58m/190 ft no 24-105mm (18mm diffuser) 25 levels TTL [nb 5] yes yes 3.5 Yes (only E-TTL/i-TTL slave) Can operate as E-TTL/i-TTL master Can update firmware over USB Has secondary reflector High Speed Sync Yes

  4. Through-the-lens metering - Wikipedia

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

    Nikon refers to this technique as "3D matrix metering", although different camera manufacturers use different terms for this technique. Canon incorporated this technique in E-TTL II. More advanced TTL flash techniques include off-camera flash lighting, where one or more flash units are located at different locations around the subject.

  5. Canon EOS - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS

    This was the first Canon camera with through-the-lens (TTL) flash metering, although other brands had been metering that way for some time. It also introduced the A-TTL (Advanced TTL) system for better flash exposure in program mode, using infrared preflashes to gauge subject distance. This system was carried over into the early EOS cameras ...

  6. Canon EOS 50 - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS_50

    The Canon EOS 50 (also known as the Elan II in America and the EOS 55 in Japan) is an autofocus, autoexposure 35mm SLR camera. It was aimed at the advanced amateur market, and featured a rear command dial, support for custom functions, and an optional BP-50 battery grip, with a dedicated portrait shutter release. [ 1 ]

  7. Canon EOS-3 - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS-3

    The EOS-3 introduced the 45-point autofocus system later used in the EOS-1V, EOS-1D and subsequent Canon professional SLRs. It was the last camera outside the 1-series, either film or digital, to receive Canon's top-of-the-line AF system until the March 2012 announcement of the EOS 5D Mark III .

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