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through the lens (TTL)

Through The Lens (TTL) is a camera technology term. With this technique, exposure metering and focusing are done through the lens. The settings can be made via the viewfinder or the camera display.

The Through The Lens technique is used with compact cameras and SLR cameras. In the latter, adjustments are made via a swinging mirror that flips up when the shot is taken, exposing the light channel to the image sensor.

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Englisch: through the lens - TTL
Updated at: 04.02.2019
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