“Thin” and “flat” are the biggest appearance highlights of the four new iPhones this year. When I first started with the iPhone 12 pro, a kind of hand feeling mixed with the previous iPhones constituted the first complex feeling. < / P > < p > on the one hand, the flat body makes the iPhone 12 Pro feel like an iPhone 5, but the simpler details and larger size make this illusion dissipate quickly; on the other hand, compared with the iPhone 11 pro, which has been used for one year, the iPhone 12 Pro has a higher height, with a slightly narrower frame, making its screen increase to 6.1 inches. < / P > < p > the change in screen size from 5.8 inches to 6.1 inches is basically in line with the view that we put forward when we evaluated the iPhone 11 last year, that is, in today’s information and entertainment era, 6.1 inches can better meet the needs of the public. < / P > < p > moreover, although the screen of iPhone 12 Pro is larger this year, compared with the 6.1-inch iPhone 11, the former has smaller overall size and thinner body, which is a balance between large screen and hand feel. So if you can hold a 5.8-inch model with one hand, the 6.1-inch iPhone 12 Pro should have no pressure. < / P > < p > as for the right and wrong argument between right angle and round middle frame, everyone should be able to express their own opinions. In my opinion, the “practicability” of the right angle frame should be stronger, because the screen can be completely wrapped by the middle frame, and the metal middle frame can provide better protection for the screen when the mobile phone accidentally falls, reducing the occurrence of broken screen. < / P > < p > but the advantage of the round middle frame is the feel, especially when you touch the iPhone 12 Pro for a few days and then return to the iPhone 11 pro. < / P > < p > this year, the wide-angle lens of iPhone 12 series has been upgraded to f / 1.6 aperture, which is slightly larger than last year’s f / 1.8 aperture, which increases the light input of wide-angle lens by 27%. < / P > < p > from the practical experience, limited by the size of the mobile phone lens element, the slightly larger aperture has very limited effect on the improvement of the picture. Under the same conditions, the wide-angle lens imaging performance of iPhone 12 Pro is almost the same as that of iPhone 11 Pro last year. < / P > < p > the ultra wide angle lens with an equivalent focal length of 13mm was the highlight function of the iPhone 11 series last year. Although this lens can bring a broader perspective, the image quality is not satisfactory, especially in the scene with poor light conditions. < / P > < p > this year’s iPhone 12 series is still equipped with this ultra wide angle lens. Although the parameters are still the same as those of the previous generation, thanks to the blessing of “night mode” and “deep fusion”, the imaging quality of this ultra wide angle lens has been fully improved. < / P > < p > in the night scene, it can be seen from the contrast sample above that the performance of the ultra wide angle lens is better when the night mode is turned on, whether it is the preservation of building details, or the control and brightness restoration of the picture noise. This is because, compared with the previous single frame recording when night mode is not supported, when night mode is turned on, the ultra wide angle lens will take multiple frames of material at the same time for composition, and “calculate” a picture with more details, less noise and more accurate white balance. < p > < p > the quality of the iPhone’s wide-angle lens is still different from that of the wide-angle lens when it is in the night mode. < / P > < p > in addition to the night mode, thanks to the neural network engine of A14 bionic chip and the new image signal processing unit, the portrait mode of iPhone 12 Pro has made great progress. < / P > < p > in the past, when shooting some objects with less obvious edges, it occasionally happened that matting failed. However, this year’s iPhone 12 series has become more accurate in portrait mode matting, and the distinction between subject and background is more detailed. < / P > < p > there are two more interesting features of the camera function of iPhone 12 pro. One is the combination of lidar lidar sensor to achieve faster dark light focusing speed and night portrait mode. < / P > < p > in the scene with very weak light, when shooting with iPhone 12 pro, lidar lidar sensor will be activated to scan the depth information of the scene to assist other cameras to achieve faster focusing speed. < / P > < p > in order to compare how much the lidar sensor can improve the focusing speed of the dark light, I deliberately recorded the focusing pictures of two viewfinders, one with the participation of lidar sensor, and the other with the artificial occlusion of lidar sensor. < / P > < p > in addition, there is a “scene detection” in the camera setting interface of the iPhone 12 series. Apple didn’t directly mention this function on its official website, but mentioned that the neural network engine of A14 bionic chip has more advanced scene recognition ability, which can distinguish different elements in the picture. For example, in the contrast sample below, in the picture with “scene detection” on the right, the color of green leaves is slightly more natural. < / P > < p > generally speaking, the iPhone 12 series is a brand-new experimental field for apple to bring “computational photography” to the limit, and I think this is also the right way for mobile phone photography. After all, the price of hardware upgrade to improve the shooting performance on a mobile phone with an inch of land and money is often the body becoming thicker and heavier, and the improvement brought by the algorithm will not have these troubles. < p > < p > A14 is Apple’s first 5nm process chip in the world. The number of transistors in the new process reaches 11.8 billion, 40% more than that of A13 with 7Nm process last year. < / P > < p > in the previous rapid evaluation, we found that the CPU performance of A14 is better than that of A12 in both single core and multi-core. However, if we compare A13 last year, the overall improvement effect is not very obvious, about 20%. < / P > < p > this is also basically in line with the evolution route of A-Series chips. Looking at nearly five generations of products, from A10 in 2016 to A14 this year, whether it is single core or multi-core, the improvement brought about by the next generation upgrade is relatively stable, and the “toothpaste tube explosion” situation is rare. < / P > < p > in addition, after the new machine is launched, it needs to be optimized by the developer, so that the performance can be fully released in the game / application. So for users who upgrade every other generation, it may be difficult to clearly perceive the difference between “eating chicken” on iPhone 12 or iPhone 11. < / P > < p > when I experience the game performance of iPhone 12 Pro these days, my attention is more attracted by the slightly larger screen and thinner body. Although the flat middle frame can’t touch the hand, it is easier to notice than the arc middle frame after holding it for a long time. < / P > < p > in addition to the performance and appearance changes for the game experience, 5g is also the main selling point of this year’s iPhone. However, after a few days of experience with my colleague’s 5g card, I chose to turn off the 5g function of iPhone 12 pro and continue to use 4G. < / P > < p > the main reason is that the power consumption of 5g is higher than that of 4G, and the additional heat dissipation burden is increased. According to the actual measurement, the fully charged iPhone 12 Pro plays “King’s glory” for 30 minutes in a row with 5g function on, and the power consumption drops to 82%, while the game process for 30 minutes in a row only consumes 9% power with 4G signal. < / P > < p > and after 5g is turned on, the degree of fever of iPhone 12 Pro after 30 minutes of continuous game running is significantly higher than that of using 4G network. Although 5g can bring lower network delay and faster network speed, in the absence of application scenarios, playing games with 4G and 5g will not only make your mobile phone consume more power and heat, but also significantly improve it. < / P > < p > secondly, high 5g charges and poor signal coverage are also the important reasons why I choose to keep 4G. For specific analysis, please refer to the article “5g package opening guide” published earlier. < / P > < p > starting from the iPhone x, under the joint effect of the new design of the full screen fuselage and the Intel baseband, the signal problem has become the most puzzling puzzle of the iPhone. It is estimated that many people have encountered the situation that even if the signal bar is full, they can’t brush out the circle of friends / microblog for a long time and can only manually open the flight mode to refresh the signal again. < / P > < p > but the signal performance of the iPhone 12 Pro using the high pass baseband is much better than that of the iPhone 11 pro. In the past year, when using the iPhone 11 pro, the signal / network turns around at the moment of entering the elevator. Especially when waiting for the bus at the company’s downstairs bus stop, it is likely that the mobile phone signal is full, but the network can’t display the content. < / P > < p > when the same Unicom card is inserted into the iPhone 12 pro, the situation of these signals dropping off the chain is significantly reduced. When you enter the elevator or in the subway, you will no longer be “isolated from the world”, and the frequency of re searching for signals by switching flight modes is also greatly reduced. < / P > < p > for most people, the iPhone 12, which is about 2000 yuan cheaper and also provides a balanced configuration, is obviously more versatile, while the iPhone 12 Pro seems to be a little “no hit” without the advantage of the screen. < / P > < p > in my opinion, the reason why iPhone 12 Pro can be called “pro” is mainly three camera system and process design. These two differences are the most important factors that ultimately affect your choice of pro or non pro: exclusive long focus lens and lidar The sensor can greatly broaden your shooting scene, especially in the long-range shooting and dark light shooting; frosted glass with stainless steel metal frame represents the most high-end process material of apple, and the texture is much better than the iPhone 12 with glass back cover and aluminum metal frame. Google said the proposed media negotiation rules would put its free services in Australia at “risk”