AI and machine learning: These are showing a lot of promise in the area photography.
Pixel binning: Combining multiple pixels into a single super-pixel offers better quality on digitally zoomed-in images, rather than just cropping afterward.Such a high-resolution sensor means there’s more image to crop and, therefore, more digital zoom to be had. Using incredibly high-resolution sensors: Samsung’s Galaxy S20 has a 64 MP telephoto camera.Thus, smartphone manufacturers are using the following tricks to make digital zoom better and minimize quality loss: Periscope lenses are a relatively new development (at least in smartphones), so there’s still some figuring out to do. Optical zoom is expensive, both in terms of production cost and the tradeoffs necessary to add it to a smartphone. Enhance!ĭigital zoom, however, is having a bit of a moment. And the more you zoom in, the worse the image quality gets. While optical zoom magnifies without losing image quality, digital zoom reduces it. The zoomed shot has a noticeably lower resolution. This phone has a 2x optical zoom, but a 10x digital zoom. Take the shot below from an iPhone Xs, for example. A long telephoto lens for a DSLR, like those you see sports photographers using at games, has a focal length of between 500-1,000mm. The optical zoom comes from lenses with long focal lengths that are at least relative to the camera’s sensor size. There’s no loss in quality-objects just appear closer. If you view the moon through one, it looks bigger. For example, a telescope is all optical zoom. Optical zoom is when the physical properties of a lens genuinely magnify distant objects. All you really need to know, though, is zoom depends on the underlying focal length of a lens and the size of the sensor-and that it’s a bit disconnected from reality.īut what’s the difference between optical and real zoom (I’ll keep using this word for the sake of convenience, but what I really mean is “apparent magnification” or “narrower relative field of view”)? How Optical Zoom Works If you want to know more, you can check out this piece on how zoom specs are calculated.
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The Huawei P40 Pro also has a periscope lens with a 5x optical zoom. Unlike with compact cameras, this means you can expect mostly the same rough magnification with different 10x-zoom smartphones. Smartphones like the iPhone 11 Pro add an even wider lens and call it a 0.5x zoom, rather than resetting 1x to the new widest angle. A 1x zoom is broadly accepted as the field of view of the main camera. Smartphone manufacturers, however, use zoom slightly differently. This meant a lens with 10x zoom didn’t necessarily make things look 10 times bigger.
So, a 10mm-100mm lens had 10x zoom, while a 25mm-100mm lens had a 4x zoom. Originally, it was the ratio between the shortest and longest focal lengths of a lens. Zoom, as we use it now, is basically a marketing concept popularized by compact cameras. The marketing for the Huawei P40 Pro’s wide-angle lens claims it has a 0.6x optical zoom. There are enough factors at play that lenses aren’t sold based on how much they magnify objects rather, they’re sold based on their focal length.
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