Is the pixel justice? It’s the truth to take what you need

  The booming year of 2019 has come to the end of the year, and the speed of camera products has never stopped. The rounds of new camera products have once again given us a new understanding of the revolution and rapid development of technology. 100 million pixels of medium format, 60 million pixels of full frame, and even mobile phones have 100 million pixels. . . . . . While these staggering pixel specifications are impressive, many people have a lot of unclear understanding of the number of pixels. So today’s article will discuss the meaning of pixels and their use.

Is the pixel justice? It's the truth to take what you need

   Is it necessary to have high pixels?

  The reason for writing this article is that I have recently seen news that Canon and Nikon have exposed the specifications of their “flagship” products EOS1D-XIII and D6. The exposure mentioned these two cameras. The 24 million pixel full-frame sensors are used, which are slightly higher than the previous generation of about 20 million pixels, and this issue has attracted heated discussions among netizens. It is indisputable that there are many people who think that these two products have low pixels. It can be said that in today’s era of sharply rising pixels, it seems that there is no level of 40 million pixels. Don’t be embarrassed to produce new products.

Is the pixel justice? It's the truth to take what you need

   Nikon and Canon “Sports machine”

   As everyone knows, the two products mentioned above have never been positioned with high pixels since their inception. We also commonly call these products “sports machine” Or “news machine”. All optimizations and pixel counts of such products contribute to the shortening of the cache time after high-speed continuous shooting. In short, “fast is the king”. At the same time, for the press and publishing industry, whether it is paper or online media, the demand for pixels is not the primary concern. Let’s go back to the era of the 2008 Olympic Games. Canon EOS1DIV and Nikon D3 were the main products of that year. About 10 million pixels can meet the communication needs of newspapers or websites.

  Storage and dissemination efficiency

  Even now, the physical limitations of storage media still cannot allow high-resolution files to be transmitted well. For files with 20 million to 24 million pixels, high efficiency and versatility can be obtained with the current technical means in storage, preservation, and transmission. The files brought by high-resolution cameras need to consume more related resources. In the news industry where the speed is winning, one second delay will delay a lot of important information and effectiveness.

Is the pixel justice? It's the truth to take what you need

  The work “Country”, photographer Wei Zheng

   On the other hand, when we open the news client of our mobile phone to open a push, the pictures we see are all compressed files, so the pixels The necessity of in this area is not the focus of consideration.

  Picture quality and resolution

   Here, let’s put aside the issue of photo application scenarios. Is high-resolution almighty? A high-pixel sensor first needs a higher-quality lens to “feed”, otherwise the picture is prone to low sharpness and soft visual perception due to insufficient resolution.

   In addition, the performance of high sensitivity is also a major bottleneck. At present, the biggest shortcoming of the current mainstream high-pixel models is that the available sensitivity range is too small, except for the “slow” cache, which usually does not exceed ISO3200. The high pixel is also a big test for the stability of shooting. The slight jitter will be especially obvious after 100% zoom. The speed of the safety shutter is increased by 1-2 blocks than before.

Is the pixel justice? It's the truth to take what you need

  The number of pixels is OK It directly affects the speed and cache efficiency of high-speed continuous shooting.

  High pixels and cropping

   And cropping is a way that many people use high pixels to “lazy” through cropping. Let the subject or subject area of ​​the screen increase to make up for the regret of insufficient focus. Although the high pixel is more capricious, it is still not recommended. First of all, cropping cannot change the perspective structure changes brought about by the change of lens focal length. Secondly, excessive cropping will make the picture obviously unnatural, especially the transition of the edges of the picture lines, which is also caused by the lens resolution problem.

   Therefore, in general, the number of pixels does not need to be pursued blindly. If you are good at shooting scenery or commercial themes, and you need large-scale printing and production, high pixels have the value of existence; if you want to shoot more and more extensive themes, daily network sharing, etc., nowadays 24 million pixel products can be satisfied. For news and sports photographers, the upgrade of the so-called “flagship” products is more about focusing and continuous shooting. The improvement of pixels may be regarded as a regular operation of technological innovation!

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