Understanding the distinction Between f-Stops and T-Stops in Photography and Videography

If you pay your whole life shooting icon and ne'er making an attempt video, you may ne'er even hear of a T-stop.
However, they'll tell you some terribly useful data regarding your lenses.
The differences between f-stops and T-stops. Whereas associate f-stop is that the quantitative relation of the focal distance to the diameter of the doorway pupil,
the T-stop is that the f-stop divided by the root of the lens' transmission.

In other words, you can think of the T-stop as the f-stop adjusted to account for light losses as light passes through the lens elements on its way to the sensor.

Note that the T-stop is just involved with the effective f-stop as associated with lightweight transmittance; for depth of field functions, the conventional f-stop remains the right live.

In addition to what the video mentions, T-stops square measure significantly helpful to filmmakers as a result of they guarantee consistency in exposure across multiple scenes, lighting setups, lenses, angles, etc.

While such inconsistencies could be corrected in post, it saves a lot of time and production money to get them right in camera.