Huawei Mate50 "variable aperture", will it be a new killer of mobile phone images?

time:2022-11-27 01:50:14 source:scripttoolbox.com author:Small parts
Huawei Mate50 "variable aperture", will it be a new killer of mobile phone images?

To talk about what's going on in the digital world recently, the press conferences held by Huawei and Apple can be described as the "Technology Spring Festival Gala" in the field of mobile phones. No, on the afternoon of September 6th, at the autumn launch of Huawei's Mate50 series and full-scene new products, Huawei Imaging XMAGE was also officially unveiled, especially the "variable aperture" technology used in the Mate50 series super-light variable main camera. Impress. He is strong and he is strong. Let's pick one. Today, Levi will talk to you about the "variable aperture" technology that is cold and hot on mobile phone images. (Photo source network) What is "variable aperture"? As soon as you hear this word, your friends are probably a little confused. What is "variable aperture"? We might as well take a look at the Huawei variable aperture patent map exposed online last year. As shown in the figure, the six blades on the outside of the lens can be blocked by opening and closing, and the amount of light entering can be controlled by changing the clear aperture of the lens. (Photo source network) Variable aperture is not uncommon. For photographers, this is a sparse and common thing, because at present, whether it is as low as 100 yuan or as high as 10,000 yuan, camera lenses support aperture adjustment, that's right , even a prime lens that cannot adjust the focal length can adjust the aperture size. It is worth mentioning that the camera lens also has more blades. (Photo source network) But why is the common variable aperture installed on the mobile phone so hot? The reason can be summed up as "rare and strange". Limited by the size of mobile phones and related technologies, the aperture of most mobile phones in the past was constant, such as f/1.8, which is commonly seen in mobile phone posters, etc., which is both the maximum aperture and the only aperture size. (Photo source network) The use of variable aperture technology on mobile phones can be traced back to the era of Nokia’s dominance. The Nokia N86 released in 2009 provides three-speed automatic aperture selection function of f2.4/f3.2/f4.8, and it supports Mechanical shutter up to 1/1000th of a second. However, the Nokia N86, which was in the limelight for a while, did not lead the development and popularization of variable aperture technology, and this technology was also silent. (The picture shows Nokia N86) Entering the era of smartphones, Samsung launched the Galaxy S9 in 2018 that supports f1.5/f2.4 two-speed variable aperture adjustment; in the same year, OPPO also launched f1.5/f2.4 two-speed variable aperture adjustment OPPOR17Pro with aperture adjustment; Sony XperiaPRO-I released last year supports f2.0/f4.0 two-stop aperture. Among them, Samsung attaches great importance to variable aperture technology, and many of its models have used variable aperture technology until the Samsung Galaxy Note10 series became the stunner of variable aperture technology. From this point of view, variable aperture technology seems to have always been just an unpopular technology, so what is its value? (The picture shows the Samsung Galaxy S9) What is the use of "variable aperture"? Before talking about "variable aperture", we need to understand what is the use of "aperture". A friend who is familiar with photography said that I know this. As one of the "three elements" of photography, the role of the aperture is to determine the amount of light entering the lens. Generally speaking, if you compare the lens to a cat's eyes, the light is strong during the day, the cat's eyes shrink into a line to adapt to the light, and the camera lens is also aggregated into small holes through the aperture blades, reducing the aperture to reduce the amount of light entering; at night, the cat is open again. Large and round to achieve night vision, the same is true for camera lenses. By expanding the aperture, the amount of light entering is increased to ensure normal exposure at night. (Photo source network) However, the aperture of the mobile phone lens is constant, no matter day or night, the amount of incoming light always remains the same, usually we say "varies with time", it seems that the constant aperture of mobile phones is unreasonable. For example, when the light is insufficient at night, we do not want to make the exposure time too long, and we do need a large aperture to increase the amount of light entering; but when the light is sufficient during the day, the aperture is still constant, and the shutter time inversely proportional to it will be very short and very short. Short, and the screen resolution is slightly lacking. Before the development of mobile computing photography was not so mature, variable aperture technology did achieve reasonable exposure in different light. Taking this Samsung Galaxy Note10+ in my hand as an example, when using the main camera AI mode to take pictures, it is always taken with a small aperture of f2.4 during the day, and it will automatically switch to a large aperture of f1.5 at night (here the large and small apertures). only in relative terms). (Samsung Galaxy Note10+ auto mode shooting during the day; sufficient light at this time, the shutter time is as short as 1/6319 second; AI opens f2.4 aperture) (Samsung Galaxy Note10+ automatic mode shooting at night; the light is dim at this time, the shutter time is as long as 1/50 second , about to exceed the safety shutter; AI opens the f1.5 aperture) Here we want to introduce a concept, such as the meaning of "F" in "f1.5/f1.4". We are used to expressing the aperture size by the F value. The larger the F value, the smaller the aperture, which is why f1.5 is a large aperture. Aperture F value = lens focal length / lens aperture diameter. According to this formula, for a mobile phone camera with a current physical focal length of 4mm, the aperture diameter of the f1.8 aperture is only 2.22mm; while for a camera lens with the same f1.8 aperture of 50mm focal length, the aperture diameter can reach 27.7mm . For mobile phone images, the aperture of the mobile phone and the aperture of the camera are not the same. In addition to controlling the amount of light coming in, adjusting the aperture can also change one property - depth of field. We often say that a large aperture should be used to shoot people, and the background blur effect will look good; a small aperture should be used to shoot landscapes to ensure the edge quality is clear. In theory, when we use the mobile phone to open a large aperture to shoot close objects, the edges will be blurred. Also use Samsung Galaxy Note10+ to shoot a piece of text, the same position, the same distance, the edge of the f1.5 aperture is much blurrier than the f2.4 aperture, but to avoid this, you only need to properly zoom the phone and the subject. (Note: At this time, it is too close to the book, so that the picture is distorted). (Samsung Galaxy Note10+F/1.5 shot) (Samsung Galaxy Note10+F/2.4 shot) "Variable aperture" propaganda > Practical? To sum up, even I feel that the practical significance of reducing the aperture is really small, especially in the current situation where computational photography develops so rapidly, the constant aperture of mobile phone lenses is sufficient to control common shooting scenes, so is "variable aperture" just a A gimmick? Similarly, we need to make an analogy to the camera. After getting a camera lens for repeated test shots, photography enthusiasts may give evaluations like "full aperture available", "maximum aperture reduced by two stops for best image quality", which involves More professional photography knowledge. Analogously, this is like a mobile phone that claims to support a screen refresh rate of up to 120Hz, but there will be problems such as color cast when it is turned on, and it will not affect the display effect only at 90Hz. (Photo source network) The reduction of the aperture of the camera lens is partly due to the need to obtain better image quality, but for mobile phone lenses, this argument is debatable. Here we need to introduce the concept of "equivalent aperture", which is the difference between the aperture of a phone lens and a full-frame camera lens. For the Xiaomi 12SUtarl with a one-inch outsole, which has been in the limelight some time ago, the aperture of the main camera f1.9 is approximately equivalent to the aperture of full-frame f5.6, and the gap between the mobile phone and the camera is evident. This is also a question we are often curious about: why is the aperture of the mobile phone so large at f1.5, but the blurring effect of the shot is not as good as the smaller aperture of the camera? (Photo source network) Due to the consideration of internal space, the mobile phone does not have much space for the mobile phone lens group, which means that the mobile phone lens has to be compromised in all aspects. The aperture and focal length of the mobile phone lens are constant. If you want the blurring effect of shallow depth of field, you can only shorten the distance from the subject as much as possible; the size of the sensor should also be reduced. gap between. Cameras have professional attributes, while mobile phones are more portable for entertainment. Mobile phones use multiple cameras to make up for the lack of zooming, and use algorithms to improve the weak performance of portraits and night scenes. In addition to the configuration of the mobile phone image as much as possible, the algorithm is still the difference between it and the camera. (Zeiss portrait-style filter of vivoXFold) Under the current situation, it is really difficult to evaluate what kind of qualitative breakthrough the "variable aperture" technology, which is cold and hot, will bring to mobile phone images. At the Huawei Mate50 series conference on the afternoon of the 6th, the super-optical variable lens on the main camera supports 10-stop adjustable physical aperture between f1.4-4.0. From the hardware level alone, the super-light variable main camera of the Huawei Mate50 series has indeed achieved a technological breakthrough in the previous "variable aperture", which has been increased from a fixed two-speed adjustment to ten-speed optional adjustment, making the mobile phone lens look more like. The optical lens of the camera. The adjustable aperture span of f1.4-4.0 is also unprecedented for mobile phones in the past. For most mobile phones that still use a constant aperture, the Huawei Mate50 series has opened up a differentiated selling point. However, it is always better to say it well than to use it well. Is this move of the Mate series to justify the name of "variable aperture"? Or "fried cold rice" and "selling gimmicks"? After learning about the variable aperture technology, I am more looking forward to the actual performance of the Huawei Mate50 series.

(Responsible editor:Computer machine)

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