From the course: Photography Foundations: Lenses

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Servo focus

Servo focus

From the course: Photography Foundations: Lenses

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Servo focus

This is the Canon 24-105 EFL. In addition to its great zoom range of 24-105 millimeters, which makes a fantastic walk-around lens, its four stops of image stabilization, its constant f4 aperture across its zoom range, the low dispersion glass, the red stripe around the end of the lens, which lets people know that you're a discerning shooter. in addition to all of that, it makes a great pendulum. Now the problem is if I stick a camera down there and I want to shoot this lens as it swings back-and-forth, I got problems, because I'm not going to be able to focus on it very easily. Here's why? Focus of course is a matter of the distance between the lens and the camera and if I focus right here, it's immediately swung out of focus, and-- stop that! it's immediately swung out of focus and my image will be blurry. Now I can try to half press the shutter button along the way and keep up with it, but it's really difficult to do when something is moving that quickly. Now, you may think I don't…

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