Key Terms: Aperture, Shutter, and ISO (Camera Lesson 01)
Summary: Ryan covers the first three crucial camera terms: aperture, shutter, and ISO.
Length: 8:32 minutes
“Are you ready to go out and start shooting in 4k, while you over crank at 36 frames, on an 85mil, at a T4?”
Camera jargon can sounds like a foreign language when you’re just starting out- Fortunately it really isn’t that complicated – anyone can learn it. In this video I’ll be covering the first three of what I consider to be the six essential terms you need to know.
The aperture is the hole or opening in the lens that controls how much light ends up on the sensor. It is the ratio of the focal length of the lens, over the size of the aperture. You control the aperture either by physically moving the lens, or by dialing it in with a wheel on the camera. As you change the aperture, you are changing its size, which is why the numbers change too. It is expressed in either F-Stops or T-Stops.
When it is expressed as an F-Stop, it’s telling what the mathematical equation is at that point. T-Stops, on the other hand, are a physical measurement of the transmittance of the lens; so how much light it is actually letting through. Because F-Stops are a ratio and not a measurement, there can be variations in exposure levels when using F-Stops. If you want everything to match perfectly in exposure level, then you want to use lenses that have T-Stops, since that is an exact measurement of how much light is actually being let through.