Understanding The Soul Of Your System: Lenses (Camera Lesson 07)
Summary: Ryan covers the important aspects of the camera lens, how they affect the images you create for your film, and what you should consider when selecting a lens for your next purchase or film shoot.
Length: 12:45 minutes
In this video, I’m going to cover the second most crucial part of your camera system, your lenses. If your camera body is the heart of your system, then I consider the lens to be the soul, as the lens choices you make have a direct impact on the look and feel of your images.
Lenses are measured in focal length. The length of a lens is the measurement, or to be more precise a calculation of the distance from the lens to the point where the light rays converge at the sensor. This measurement is given in millimeters. Because this is an actual measurement, it is key to point out that the focal length of a lens never changes. It is fixed. Even if you change sensor sizes- the focal length remains the same. A 50mm lens, is a 50mm lens regardless of if you use it on a camera that has a full frame sensor, or a micro four thirds sensor. What happens when you change sensor sizes is that you are cropping what the camera can see from that lens. So you are changing the field of view- or you are seeing less of the image that the lens is projecting. But I get into that more in the video on sensor sizes and crop factors. For now, what is key to remember is that the focal length of a lens, never changes, it is what it is regardless of the camera’s sensor.
Not only is the focal length of a lens a measurement, …