How Digital Cameras Work | How Things Work with Kamri Noel

How Digital Cameras Work | How Things Work with Kamri Noel



digital cameras we use them everyday they're in our pockets on our phones but do we actually know how they work how does a digital camera take this and make it this Oh hey where did are you my expert actually I am Tom O'Brien the photo engineer for National Geographic magazine so you're like the perfect person to explain how all these cameras work well I don't know about perfect but let's take a look at this camera when you press the shutter button this shutter opens allowing the light to stream through the aperture of the camera's lens to the cameras eye so when I hit the shutter button it's like pulling back a curtain to let the light come in and hit the eye yes but only for a small amount of time the camera only needs a little bit of light to capture a moment but how does it record the image the cameras eye or sensor as we call it perceives the light as electrical signals to demonstrate this let's take a photo all right I got this Sophie cute indeed now this is what your camera first saw these are the electrical inputs of the light Oh like pixels in a video game yes that's your camera's electrical signal of the incoming light after Kara collects the signal encodes it all as data my computer data yes this carries the measurements of each pixel every pixels color and brightness so the more pixels a camera renders from light the more detail in the photo totally we call this detail resolution however when a subject moves too quickly for the camera shutter it can appear blurry in the photo huh let's try this yeah let's okay huh definitely blurry maybe increase the shutter speed this time ready yes much better Tom Tom Tom now that you know how that works catch up on all the other episodes of how things worked by clicking right here and also make sure you subscribe to NatGeo kids by clicking down here see you next time

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