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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 ...
^Digital Camera Disasters: Will Yours Get Fixed? One widespread camera problem gets out-of-warranty repairs, another gets a lawsuit. (Grace Aquino, PC World, Tuesday 21 February 2006); ^ Repair guide; ^ IXUS 40 aka SD300 Repair Guide; ^ E18 quick fix (CNet Digital cameras forum); ^ Action by Horwitz, Horwitz & Associates at the Wayback Machine (archived 23 January 2013); ^ Investigation by ...
The light returning through the lens is measured and this value is used to calculate the amount of light necessary for the actual exposure. Multiple pre-flashes can be used to improve the flash output. Canon referred to this as Evaluative TTL (E-TTL) and later improved the system with E-TTL II. The first form of digital TTL by Nikon, called "D ...
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 ...
Canon printers are supplied with Canon Advanced Printing Technology (CAPT), a printer driver software stack developed by Canon. The company claims that its use of data compression reduces their printer's memory requirement, good quality compared to conventional laser printers, and also claim that it increases the data transfer rate when ...
Canon EOS 450D Canon EOS Rebel XSi Canon EOS Kiss X2; Overview; Type: Digital single-lens reflex camera: Released: March 2008 () Lens; Lens: Canon EF lens mount, Canon EF-S lens mount: Sensor/medium; Sensor: CMOS APS-C 22.2 mm × 14.8 mm (1.6× conversion factor) Maximum resolution: 12.2 effective megapixels, 4,272 × 2,848: Film speed: ISO 100 ...
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The first camera to employ the pellicle mirror as a beam splitter for the viewfinder was the Canon Pellix, launched by Canon Camera Company Inc. Japan in 1965. The object was to accomplish exposure measurement through the lens , which was pioneered by Tokyo Kogaku KK, Japan in the 1963 Topcon RE Super.