From the course: The Practicing Photographer

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What is a low-pass filter?

What is a low-pass filter?

From the course: The Practicing Photographer

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What is a low-pass filter?

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- When you're shopping for a camera and looking at spec sheets, you might come across the term low-pass filter or anti-aliasing filter. These are two terms for the same thing. It's a filter that sits in front of the image sensor inside the camera. It's not a part of the camera that you'll ever interact with. It's nothing you have any control over. It's also not something that all cameras have and that's why it's a term you may come across when camera shopping. The lack of low-pass filter can be considered a feature, so it's something that some camera vendors hype. A digital image is composed of a group of pixels. Each one of those pixels is a little sample of the light that is bounced off of the scene that you pointing your camera at. Because those pixels are arranged in a regular grid pattern, if you point your camera at something in the world that also has a regular repeating geometric pattern, it's possible that the…

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