Education: Parcing the Difference Between F-Stop and T-Stop
Everyone who is interested in photography has some idea of what “F-stop” and “T-stop” are. If you do not already know these concepts and just begin to delve into the world of cinematography, then let me help you with this small post.
“F-Stop” is the level of increasing or decreasing the amount of light entering the lens. The level means that the light on the film or matrix of the camera will be twice as large (or less).
Many people understand this wrong; many are afraid because it sounds complicated. In fact, “F-stop” is very simple in the video production.
Changing the exposure to stop doubling the amount of the lens light entering. For example, if you hear that you need to increase the exposure for 1 degree, it means that it requires to capture twice as much light as received.
In turn, “T-stop” is a parameter that shows how much the lens light misses. Unlike “F-stop,” “T-stop” directly indicates how realistic the lens is.
Every familiar parameter “F-stop” is only about the size of the lens relative diaphragm, through which light enters the camera matrix.
As you can see, in many ways the diaphragm principle is the principle of the eye pupil: when the diaphragm closes, less light enters the lens and the matrix; when it opens, then vice versa.
Thus, the diaphragm opening and closing can achieve brighter or darker images or influence other shooting parameters such as field depth. If you have something to add about the diaphragm, “F-Stop” or “T-stop”, be sure to comment!