How does vivoX100Pro achieve "telephoto focus"? What is the function of APO lens?

On the evening of November 13th, vivo held a grand press conference at the Water Cube in Beijing, officially launching a new flagship mobile phone - vivo X100 series

It can be seen from the name "100" that vivo is committed to This mobile phone has enough confidence and expectations, and it is the culmination of many years of hard work by vivo.

The most impressive thing about the vivo X100 series is its amazing imaging performance. It can even shoot the sun directly. It is officially called "telephoto hanging sun", which is a huge achievement in the field of mobile phone imaging. Breakthrough

In order to achieve a "black technology"-like experience, the vivo X100 series has achieved a number of first-of-its-kind achievements, such as it is equipped with the first Zeiss-certified APO telephoto lens in the mobile phone industry

So the question is, what is an APO lens? Why do telephoto lenses use APO? What impact will APO have on the future of mobile phone photography? Let’s find out together.

APO lens refers to a lens with ultra-low dispersion characteristics. APO is the abbreviation of Apochromatic, which means "quasi-chromatic aberration". Traditional lenses will experience chromatic aberration when focusing light of different wavelengths onto the focal plane, that is, light of different colors cannot converge at one point at the same time, resulting in color deviations at the edges of the image. The APO lens effectively reduces or eliminates chromatic aberration through the use of special optical designs and materials, allowing the image to maintain pure and accurate color throughout the entire screen. Therefore, APO lenses are often widely used in photography fields that require high-quality color performance, such as portrait photography, landscape photography, astronomical photography, etc.

APO is the abbreviation of Apochromatic, which means "reducing chromatic aberration". APO is not a standard, but a name used to reduce dispersion

We all know that white light is actually composed of seven colors of light: "red, orange, yellow, green, blue, purple". When passing through the lens, due to various The refractive index of the two colors of light is different and separated, focusing on different points, that is, chromatic aberration is produced.

Color aberration will make the light that is normal to the naked eye become colorful, which will affect the normal color display, such as the "purple fringing" phenomenon that you see in photos. It is the most intuitive color difference phenomenon.

Therefore, a technology is needed to eliminate chromatic aberration so that the colored light can be re-fused and focused on the same point. This technology is called "APO"

Especially in telephoto lenses, the dispersion will become larger as the focal length increases, because the light travels longer after refraction, causing the light of different colors to shift more. If it is large, the color difference will be serious. Therefore, when designing a telephoto lens, the first solution is to eliminate chromatic aberration.

Understanding APO, you can understand the meaning of APO lens, which is a lens with the ability to eliminate chromatic aberration of multiple colors of light (more than two)

Zeiss has promoted APO technology to a new level Step

Before the advent of the vivo X100 series, APO lenses were generally used in professional cameras, telescopes and microscopes. APO lenses have always been synonymous with high quality in the field of optical lenses, especially telephoto lenses.

The birth of APO technology is not a modern technology. As early as the 18th century, Europeans discovered that different materials of glass have different dispersions. Therefore, they combined some of the convex lenses made with other concave lenses to achieve the purpose of reducing chromatic aberration

The debut of Zeiss brought APO technology to a new level the height of. In the 1870s, after careful review, Zeiss decided to use pure, colorless and transparent natural fluorite to make APO lenses, which were initially used on microscopes. After that, Zeiss extended APO technology to the field of camera lenses. Zeiss launched the Zeiss APO-Tessar lens in 1923. It has been exactly a century since then, which shows that Zeiss has a deep foundation in APO lenses.

The first Zeiss-certified APO telephoto lens in the mobile phone industry

Currently, telephoto lenses have become a must-have configuration for flagship mobile phones, and the little-known APO technology has also begun to rapidly spread in the mobile phone field Development

This time, vivo and Zeiss will transfer the strict standards based on Zeiss’ traditional camera APO lenses to mobile products and formulate a new certification standard suitable for mobile devices.

When evaluating color fringing, the same evaluation standard parameters as Zeiss cinema lenses are used. According to this standard, certified mobile optical systems can guarantee better optical performance

The Zeiss APO super telephoto lens is built according to strict standards and has top chromatic aberration control performance, becoming a mobile phone The industry’s first APO telephoto lens certified by Zeiss

No matter what the situation is, the Zeiss super telephoto of vivo X100 is unparalleled. It will be upgraded to a larger aperture of f/2.57, increasing the amount of light entering by a full 85.5%. Not only that, it also supports telephoto macro shooting and 100x digital zoom. The Zeiss APO-certified vivo X100 can achieve more accurate color restoration capabilities when shooting at telephoto, especially in backlight environments. , the telephoto hanging sun is the best proof.

With the support of Zeiss APO super telephoto lens and the newly upgraded vivo original image engine algorithm, vivo optimizes and adjusts the depth of scenes for various suns. In addition, Zeiss T* coating will also more effectively suppress glare and ghosting, allowing for clearer photos of the sun.

vivo X100 series will apply its telephoto sun-hanging function in a variety of scenes, including city street scenes, sea, desert, countryside and sun creative photos

APO telephoto lens will become the new trend of mobile phone photography

Mobile phone photography has become the focus of competition for flagship mobile phones in the past few years, from the initial single camera to dual cameras, and now to three cameras and four cameras , it can be said that the competition is becoming increasingly fierce

At the same time, based on the original wide-angle main camera, it has now also expanded to include ultra-wide-angle, telephoto, macro, portrait and other lenses.

Among them, telephoto lenses will be standard equipment for smartphones, and will evolve towards longer focal lengths, larger sensors, and larger apertures.

As mentioned before, the first solution for telephoto lenses is APO, so APO technology will also become a new trend in mobile phone photography in the future.

As the first mobile phone to take the cake, the vivo X100 series shows us the imaging capabilities of the AOP telephoto lens and also sets a new benchmark for mobile phone telephoto photography.

Of course, vivo X100 has excellent imaging capabilities. In addition to being equipped with an APO telephoto lens, it also uses a variety of technologies such as self-developed V3 chips and Zeiss full-focus modules to jointly assist

algorithms At the aspect level, vivo has also comprehensively constructed a composite algorithm matrix from technology to scenarios, which includes the brand-new vivo original image engine VOIE, which comprehensively improves vivo's underlying basic algorithm capabilities from three sub-modules: ultra-clear image quality, perfect color restoration, and computing power acceleration. Upgrade the image quality, color tone and computing power.

If you want to experience the highest level of smartphone imaging, vivo X100 is currently the best choice

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