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2. Flash (photography) - Wikipedia

   en.wikipedia.org/wiki/Flash_(photography)

   A full-power flash from a modern built-in or hot shoe mounted electronic flash has a typical duration of about 1ms, or a little less, so the minimum possible exposure time for even exposure across the sensor with a full-power flash is about 2.4 ms + 1.0 ms = 3.4 ms, corresponding to a shutter speed of about 1 ⁄ 290 s. However some time is ...

3. Hot shoe - Wikipedia

   en.wikipedia.org/wiki/Hot_shoe

   The flash unit sets up a circuit between shoe and contact—when it is completed by the camera, the flash fires. In addition to the central contact point, many cameras have additional metal contacts within the "U" of the hot shoe. These are proprietary connectors that allow for more communication between the camera and a "dedicated flash".

4. Canon PowerShot G - Wikipedia

   en.wikipedia.org/wiki/Canon_PowerShot_G

   The Canon PowerShot G is a series of digital cameras introduced by Canon in its PowerShot line in 2000. The G series cameras are Canon's flagship compact models aimed at photography enthusiasts desiring more flexibility than a typical point-and-shoot without the bulk of a digital single-lens reflex camera.

5. Canon EOS flash system - Wikipedia

   en.wikipedia.org/wiki/Canon_EOS_flash_system

   Like TTL (and like the actual flash metering, but not the pre-flash, of A-TTL), the sensor is internal to the camera and takes its exposure via the lens so any filters added to the lens will also affect the E-TTL readings giving more accurate exposure information to the camera. The pre-flash occurs immediately before the main flash (except when ...

6. Cactus (camera equipment brand) - Wikipedia

   en.wikipedia.org/wiki/Cactus_(camera_equipment...

   In 2014, Cactus released its first wireless flash RF60 along with Cactus V6. Cactus RF60 has a built-in V6. Therefore, it can receive wireless triggering signal from a V6 and fire itself accordingly without having to attach an external V6 to the flash. When using with Cactus V6, both power output and zoom level of the RF60 can be adjusted remotely.

7. 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.