T number

American  

noun

Photography.

1. one of a series of calibrations of lens openings according to the intensity of the light actually transmitted by the lens. T

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T-number British  

noun

1. photog a function of the f-number of a camera lens that takes into account the amount of light actually transmitted by the lens

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Etymology

Origin of T-number

from T ( otal Light Transmission ) Number

Example Sentences

“I read and I chant the Ten Commandments in Hebrew — the original language — every year,” said Allen, who pointed out that Jewish traditions typically don’t number the edicts the same way as Christians.

From Washington Post

The problem isn’t number of beds, but who is occupying them.

From Washington Post

This lets you make and receive calls from your AT&T number on Alexa-enabled devices, as well as from your iPad, Mac, and smartwatch.

From The Verge

“It is my small screw you to big companies that can’t number their styles,” Mr. Kinori said.

From New York Times

Seven-times Grand Slam champion John McEnroe was even more vocal in his support: “If she isn’t number one in the world by the time she is 20 I would be absolutely shocked. It was too bad for Venus that she had to play her.”

From Reuters