Olympus E-300 - Manual (Page 190)

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Appendix
Glossary
TFT (Thin-Film Transistor) Color Monitor
A color monitor constructed using thin-film technology.
TTL phase-contrast detection system
This is used to measure the distance to the subject. The camera determines if the
image is focused by the detected phase contrast.
TTL (Through-The-Lens) System
To help adjust exposure, a light receptor built into the camera directly measures
the light passing through the lens.
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