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F/stop
CCTV glossary (глоссарий терминов по видеонаблюдению) |
Also called f number and f system. refers to the speed or ability of a lens to pass light. it is calculated by dividing the focal length of the lens by its diameter.
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Foot candle, английский
See lumen/ft 2.
Eia sync, английский
The signal used for the synchronizing of scanning specified in eia standards rs-170, rs-330, rs-343, or subsequent issues.
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