Why is a camera (not a movie machine) more expensive than a SLR, and the picture quality is worse?

Cameras that are not movie cameras usually have several levels:

1. Broadcast camera.

2. Business camera.

3. Civil high-end cameras.

4. Home ordinary DV player.

As a traditional video shooting equipment, video camera has a long history and relatively mature technology. As a professional video shooting tool, it will not be replaced by other models in the short term.

Some friends think that it is an objective fact that SLR and mirrorless cameras robbed many traditional cameras. However, what we should see is that the camera is only the last category in the above camera classification, that is, household DV. It is the same reason that mobile phones have taken away the market of low-end card cameras. In professional and quasi-professional fields, cameras are still irreplaceable.

Then some friends will say that the video quality of SLR is better than that of camera. In fact, it depends on how to look at the so-called "image quality". Due to the large size of cmos photosensitive elements in SLR and other cameras, the captured video images have good shallow depth of field effect and good high photosensitive performance, which belongs to the effect of "film machine", but the use direction of traditional cameras is different from this purpose.

Although the original size of the traditional camera is small, it has a very clear purpose, which is to make the picture clearer. This definition includes the overall definition of the picture brought by the large depth of field, that is to say, the traditional camera itself does not want to shoot a picture with a shallow depth of field, but pursues a wide range of imaging definition. The reason is very simple, and it is related to its main use.

The application fields of traditional cameras are mostly radio and television media, and their positioning is long-term video recording and performance shooting such as news video recording, studio video collection, conference courses, etc. In such an application scene, there is no market for the artistic effect of shallow depth of field, so we should try to avoid the image effects such as inaccurate focus and blurred background caused by too shallow depth of field. The resolution, code stream and chroma sampling rate of professional and quasi-professional cameras are all in line with broadcasting standards, but the cameras in this respect are not so standardized. The image quality of high-end cameras can't be said to be worse than that of cameras at all, but the image quality positioning is different. Cameras that meet broadcast standards or similar specifications are not bad at all. On the contrary, cameras can't meet the needs of the broadcasting industry in terms of indicators.

In addition, the camera's wide-range zoom lens, built-in ND zoom lens, various audio and video interfaces, long battery life and control system specially designed for video are all specifications that the camera can't meet.

Judging from the current development trend, cameras and video cameras have merged and crossed to a certain extent, but in the field of professional use, they still have their own specialties, and there is no possibility of complete integration. Only in the civil field, this distinction is becoming more and more blurred.

Who told you that?

You should be talking about professional broadcast cameras, which are much cheaper in ordinary homes, so we won't discuss them!

In the professional field, the most commonly used cameras are network multi-camera live broadcast, conference recording live broadcast, wedding and other small-scale assembly content recording. From these characteristics, it is not difficult to see that this kind of camera has long recording time, high frequency of use and high requirements for the hardware foundation of the camera! Although the wedding ceremony is dominated by SLR now, the use characteristics of SLR are doomed that it is not suitable for long-term use. First, the hardware features. Professional cameras generally use 1/2.8-inch or larger coms, usually 3 pieces, to identify the three basic colors of red, green and blue respectively. There is a cooling fan inside, and the lens also supports 20x optical zoom. The basic amplification is generally 18, and the fuselage interface is more abundant. Generally, SDI, HDMI and analog audio and video interfaces are standard, and SLR is a photosensitive chip. There is no specially designed cooling duct and interface, only short films can be recorded, the interface can not be opened directly, switching equipment is needed, and the lens is not as convenient as a professional camera! The quality of webcasting has lost a lot, so the advantages of SLR in the field of webcasting are not obvious, and the battery of the channel needs to be replaced, which may even become the burden of webcasting! Although there is an external battery, the fever is extremely serious, and long-term use will burn out the photosensitive chip!

In the field of broadcasting, not to mention this, SLR is useless in professional events, large-scale parties and multi-lens satellite broadcasting!

The advantage of SLR is that with the popularization of the Internet and the rapid development of the media, it can quickly shoot some materials with high quality and low cost, and then it can develop rapidly. Moreover, SLR or some Quan Huafu micro-cameras that can shoot high-quality videos have rich lens groups, simple maintenance, convenient use and low upfront cost, and become the first choice for many freelance creators and studios.

Because there are too many amateurs, shallow depth of field is regarded as a good image quality.

I guess you only ask this question because you see a big machine? That thing is an enlarged version of DV! The real camera quality is still online.

Generally, the camera has a small foundation, a large lens ratio and many lenses, and the processing circuit compresses the image quality and renders the color. Resulting in poor image quality. Typical junk TV series is, bright sword, Chinese relationship. The high-quality TV series is, the imperial doctor Xilaile. Of course, the martial arts films in Hong Kong in the 1990s have good stereoscopic effect and better colors.

To put it simply, in fact, people's eyes are almost broken when they watch short videos online, thinking that mobile phones and cameras are all good things. Other questions, such as depth of field, battery life, and other answers are involved. Let me talk about professional and amateur colors.

In fact, if you watch a few videos casually, you will see that the color of the picture changes constantly when the light changes, especially when the composition changes. Especially the face, a little attention will find that the character's face is blue, purple and gray. Or dark for a while, bright for a while, in focus for a while, out of focus for a while. Of course, talented Up owners soon invented the auxiliary focusing method of putting their hands behind lipstick, but in some people's videos, you will see that when they put their hands in front of the camera, their hands are always in virtual focus, and the camera is always focusing on the background.

Why are the colors, brightness and focus of these videos so messy? Because the intelligence of cameras and mobile phones is still too limited, even the level of artificial mental retardation is not enough, let alone artificial intelligence. However, in order to sell more money and goods, Goose camera manufacturers have piled up various autofocus, automatic exposure and automatic white balance for you at any cost under such a limited technical level. These things may help you to make a very good video in the ideal situation, but this is only perhaps, in fact, it is often difficult to measure accurately.

Focusing and shading are easier said than done. After all, from film camera to digital camera era, it has experienced more than 100 years of technical accumulation. It is difficult to balance color and white. However, this white balance of geese is only available in the era of digital cameras. It's only been more than ten or twenty years, and the manufacturers haven't accumulated much. It happened that this thing is still the most difficult.

What is even more frightening is that the camera is an electronic device after all, and the characteristics of electronic devices are hard-working and tireless. Not only does he work tirelessly to help you shoot, but he also wants to work tirelessly to make your focus, light and shade, white balance, color and other complex things suit you every minute. The point is that he hasn't got that skill yet, but he has that tireless drive.

In fact, the most terrible thing is his tireless drive, which means that he is always adjusting and correcting. It is possible that one minute the color and white balance of the picture are very easy to lose, but the next second he will turn you into a Wu Qin face, or gray and green, but it just doesn't look like a living person. This is why many Up owners need a lot of energy to send it out after filming.

But can you blame the camera or the mobile phone? You may or may not. Tell me why you can't. In fact, it is very simple, because your camera has been tirelessly testing. So a minute ago, the picture may be sunny and the trees are green. At this time, the color of the picture is very beautiful. Then the next minute, the character came in, wearing a snow blue dress, and the camera pushed a close-up. At this time, you see that the color of the whole picture becomes very strange. Then the next minute, the character may walk on a concrete floor, which is lead gray. Then, the character sat down with a small Mazar, and the camera turned into the top of his head, and the concrete floor occupied most of the picture. Then, in the whole process, you will find that the color of this character's face is not fixed.

Why? Because your camera has been testing. So when the content in the picture is different, but the camera is not smart enough to understand that the content in the picture is different. The camera only knows that the white balance calculated with the current picture is different from that just now. The camera thinks that the white balance seems to be "wrong", and then takes pains to recalculate the white balance, and then recalculates the color of the picture with the recalculated white balance. Then recalculate the white balance the next minute, and then recalculate the color. That's why you can find that the color you shoot is never stable.

So blame the camera, of course, it is caused by the camera. It makes sense if you don't blame the camera, because that's how cameras are designed.

Having said that, how do professional cameras handle the changes in picture content and white balance? Actually, the point is very simple. Professional cameras have special switches that can turn off all these functions.

Generally, when shooting with a professional camera, the photographer will measure a white balance data from the whiteboard or gray board under the scene light, record it in the camera, and then fix the data. No matter how long it takes, as long as the photographer doesn't say it needs to be modified, the camera will always use this white balance to shoot and calculate colors. Therefore, no matter how the scene changes and the colors of people, backgrounds and lights change, the colors calculated by professional cameras will not be affected.

To sum it up briefly. The professionalism of the so-called professional equipment is usually not reflected in how many awesome functions he has, but in how many awesome functions he can turn off. Just like flying a plane, a pilot has to move hundreds of switches to fly a tens of millions of large planes. Your hundreds of cars are already automatic. Then why are planes so expensive? It is precisely because every controller on the plane must be turned off independently that the pilot can fully grasp everything about the plane. Just like if your car's oil pump can be turned off alone, your left front wheel shock absorber can be turned off alone, or the spring can be turned off alone, then your car can't be bought for hundreds of thousands.

Therefore, professional equipment is expensive and cannot meet the needs of professionals. Professional requirements often require that whatever you shoot can be played directly and used directly. For example, when news is broadcast live, when sports events are broadcast live, how can you have time for post-production and color matching at this time?

Depending on the camera, there are advantages in 4k level, large scene and close-up shooting. A SLR can't replace a camera, just as a mobile phone won't eliminate a SLR.

You are comparing the image quality of your old camera with that of your current SLR camera.

Do you think the picture quality of CCTV is poor? People use hundreds of thousands of professional cameras, but the picture quality is not as good as that of SLR.