What is the difference between optical zoom and digital zoom?
Aug 17, · In essence, digital zoom is just cropping a photo so the objects in it appear larger—no additional image information is captured. Take the shot below from an iPhone Xs, for example. This phone has a 2x optical zoom, but a 10x digital zoom. The zoomed shot has Author: Harry Guinness. Mar 18, · In short, with optical zoom you first get the subject close before you capture it. With digital zoom, your camera uses part of the image and later brings it to the correct size. With digital zoom, you therefore have more chance of quality loss. Compare it to an image that is too small and enlarged to make pixels visible/10(K).
Smartphone manufacturers like Samsung are now boasting 10x, 50x, or even x zoom. But is this even possible? What is zoom, and what does it mean to have a 5x or 10x? Lens magnification how what is optical zoom digital zoom a lens magnifies distant objects is a function of its focal length and the resulting field of whag. A lens with a longer focal length relative to optcial size of the image sensor has a smaller optcal of what is optical zoom digital zoom. This makes distant opticao appear closer than what is optical zoom digital zoom would through a lens with a shorter focal length.
Zoom, as we use it now, is basically a marketing concept popularized by compact cameras. Originally, it was the ratio between the shortest and longest focal lengths of a lens. So, a 10mmmm lens had 10x zoom, while a 25mmmm lens had a 4x zoom. Smartphone manufacturers, however, use zoom slightly differently. A 1x zoom is broadly accepted as the field of view of the main camera.
Smartphones like the iPhone 11 Pro add an even wider lens and call it a 0. Unlike with compact cameras, this means you can expect mostly the same rough magnification with different 10x-zoom smartphones. If you want to know more, what is optical zoom digital zoom can check out this piece on how zoom specs are calculated. Optical zoom is when the physical properties of a lens genuinely magnify distant objects.
For example, a telescope is all optical zoom. If you view the moon through one, it looks ootical. A long telephoto lens for a DSLR, like those you see sports photographers using at games, has a focal length of between ,mm. On smaller cameras, the focal length can be shorter. Compact cameras can get great optical zoom with mm lenses. In smartphones, optkcal have started using periscope lenses for better optical zoom. Pptical a genuinely exciting development.
However, xoom is still a long way from x, opticall, how are manufacturers getting opticao with their claims? As we mentioned previously, zoom is a hazy concept. Digital zoom takes full advantage of that vagueness. In essence, digital zoom is just cropping a photo so the objects in it appear larger—no additional image information is captured.
Take the shot below from an iPhone Xs, for example. This phone has a 2x optical zoom, but a 10x digital zoom.
The zoomed shot has a noticeably lower resolution. While optical zoom magnifies without losing image quality, digital zoom reduces it. And the more you zoom in, the worse the image quality gets. Digital divital, however, is having a bit of a moment.
Optical zoom is expensive, both in terms of production cost and the tradeoffs necessary to add it to a smartphone. Thus, smartphone manufacturers are using the following tricks to make digital zoom better and minimize quality loss:.
A real optical lens does some of the heavy lifting, while the digital techniques provide more apparent zoom. Samsung might be pumping up its zoom numbersbut there are genuine enhancements in lens technology underlying some of the hype. The current focus on camera zoom zoim smartphones what does it mean when anti lock light comes on interesting. At a certain point, though, it just gets silly.
A 5x or even a 10x optical zoom lens opens up a lot of interesting shooting options for people. It also makes dedicated cameras even more of a niche indulgence. At 20x or 30x zoom which is roughly equivalent to a 1,mm on a DSLRyou have to hold your phone incredibly still to get a good shot. It looks like smartphone manufacturers are going to continue to compete with ever-increasing digita, numbers.
The Best Tech Newsletter Anywhere. Joinsubscribers and get a daily digest of news, comics, trivia, reviews, and more. Windows Mac iPhone Android. Smarthome Office Security Linux. The Best Tech Newsletter Anywhere Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles.
Harry Guinness Zoom, like a lot rigital camera specs, is a bit more complicated than advertising campaigns would have you believe. How-To Geek is where you turn when you want experts to explain technology. Since we launched in ehat, our articles have been read more than 1 billion times.
Want to what does lion mean in hebrew more?
How Optical Zoom Works
May 06, · Optical and digital zoom are two very different ways to snap a closer photo without moving your feet. Optical zoom — the only zoom that’s really worthwhile — . Nov 08, · There are two basic ways of zooming in photography: optical zoom and digital zoom. Optical zoom leverages the physical change in a lens to adjust the distance between camera sensor and subject, whereas digital zoom uses magnification technology to enlarge an area of an image (thereby compromising the integrity of the picture by cutting down on the megapixels).
If your camera has digital zoom, it zooms in on a specific part of the image. That part is then increased to the total number of megapixels your camera sensor has. In fact, a piece of image is cut out and brought to the correct size. With cameras with a high resolution, it is possible to zoom in without too much loss of quality. If you zoom too far for the size of the sensor, your image will be out of focus.
In short, with optical zoom you first get the subject close before you capture it. With digital zoom, your camera uses part of the image and later brings it to the correct size. With digital zoom, you therefore have more chance of quality loss.
Compare it to an image that is too small and enlarged to make pixels visible. The disadvantage of optical zoom is that lens errors occur when zooming with less advanced lenses.
Ordered before Sunday , delivered Monday for free. B2B Stores Customer Service. What is the difference between optical zoom and digital zoom? You have seen the terms already come over once: optical and digital zoom. Do you have no idea what the difference between the two is? No problem, this article provides the necessary clarification. After reading, you know exactly what the main differences are between optical and digital zoom.
What is optical zoom? What is digital zoom? What are the main differences? View all cameras. Article by:. Sanne Camera Expert. Explanation of camera specifications. Advice on lenses. Customer rating: 9.