/kloc-0.0 million pixel mobile phone or 20 million pixel Quan Huafu SLR, which is the best camera effect?

In fact, I have answered this question directly or indirectly several times when answering other related questions. If you just spell the picture quality, no matter what level of mobile phone, the photo effect is not as good as that of full-frame camera, let alone 20 million full-frame camera, even the old APS-C SLR camera of12 million can't compare with it. The reason why a mobile phone becomes a shooting device is not because of its powerful shooting ability, but because of its portability, concealment and rich social attributes.

The size of the photoreceptors of SLR cameras is generally Quan Huafu (36mm×24mm) or APS-C(24mm× 16mm), and the largest sensor area in mobile phones is only Quan Huafu's 1/30. Compared with 1 100 million pixel mobile phone, the 20 million pixel SLR is equivalent to a larger space (as mentioned earlier, this means that the particle size of a single pixel is much larger than that of a mobile phone, and the signal-to-noise ratio and dynamic range are also much better than that of a mobile phone. The color, fineness, purity and tolerance of the picture obtained are far better than those in a mobile phone.

Limited by the lens size, the mobile phone lens can not face the SLR in terms of resolution (resolution) and depth of field control (blurring). It can only be realized by software interpolation or AI algorithm. These congenital defects are doomed that mobile phones cannot challenge the image quality of SLR.

In recent years, with the progress of related technology, the quality of mobile phone photography has indeed been greatly improved, but it has not reached the level that can challenge SLR cameras. The so-called upgrade is only compared with the previous mobile phones and card cameras.

Some mobile phone manufacturers exaggerate the camera functions of mobile phones (super high pixel, super telephoto zoom, super large aperture), misleading some consumers and making them think that SLR will soon be replaced by mobile phones! I hope everyone can accurately realize the real difference between mobile phones and SLR cameras in taking pictures.

The following photos must not be taken with a mobile phone, let alone with a magnifying glass.

The camera of a mobile phone can reach an inch.

The pixels of a mobile phone can be very high, but the pixels of a SLR are not high. So which camera is better than SLR? This is actually not easy to answer, because it still depends on actual needs. Normally, in terms of small-size photos, mobile phones are definitely stronger, and the photos taken by SLR are basically invisible, while the definition taken by mobile phones is better and more pleasing to the eye. But when it comes to big photos, although the pixels of SLR are not high, the details of big photos are excellent, which is unmatched by mobile phones.

So it still depends on the demand, not only the photos are better, but also different sizes will have different effects. Compared with small photos, the advantages of small pixels and large number of mobile phones are obvious, but SLR is different. SLR is no match for mobile phones now, and the reason is quite simple. Mobile phones have better portability, and the requirements for photos have far met the needs of users. It's that simple.

Of course, it is a SLR, not to mention a 20-megapixel full-frame machine. The camera on the mobile phone can't even compare with the residual image of10 million pixels, so it can't be seen on the mobile phone. You can't see it if you zoom in on the computer. The color is not even at all. Just like butter on bread, they are not the same product. One is professional equipment, and the other is communication tools. Taking pictures is just a function. There is no comparability. The camera on a mobile phone is a toy compared with a professional camera.

each has his own good/strong points

There are three reasons why the imaging quality of a 20-megapixel Quan Huafu SLR or mirrorless camera is better than that of a/kloc-0.0-megapixel mobile phone:

1. The aperture of a SLR or mirrorless camera lens is larger than that of a mobile phone.

2. The sensor area of SLR or mirrorless camera is larger than that of mobile phone.

3. The resolution of SLR or mirrorless camera lens is better than that of mobile phone.

Then why is the imaging quality of the above three points better?

Actually, as far as I am concerned, most photographers understand these three points, but they don't understand the deeper reasons behind them …

When considering optical imaging, most people only consider the geometrical optics, that is, the particle part of light. But in fact, high school physics tells us that any object has wave-particle duality, and light is no exception. Because the momentum of visible light is very small, the fluctuation of visible light is actually obvious. When considering the problem of optical imaging, the fluctuation of light should also be taken into account.

As a wave, when light passes through a slit or a circular hole, it will be diffracted. Similarly, when light passes through the aperture in the lens, diffraction also occurs. From the naked eye, the diffraction phenomenon is not obvious, because the diameter of the aperture is much larger than the wavelength of visible light, but for the tiny pixels on the camera sensor, this diffraction can not be ignored. In fact, this diffraction causes the image on the sensor to be a tiny light spot instead of an infinite resolution picture, and the image is a limited resolution picture.

In the camera, when F=P/ 1.22λ (where f is the aperture coefficient = focal length/aperture diameter, p is the pixel size, λ is the wavelength of light), the imaging system is at the diffraction limit. At this time, the camera sensor can just completely sample the image formed by the lens. If the pixel size is larger than this, the details of the picture will be lost, and it is meaningless to improve the pixel size without a smaller resolution.

At present, the size of the camera sensor in mainstream mobile phones is about 1/2 inches, where 1/2 inches does not refer to the diagonal length of the sensor, but refers to the half circumference of the effective image field, or the length of the diagonal arc of the sensor. Based on this calculation, the diagonal length of the camera sensor in the mobile phone is about 8mm, that is to say, the area of the camera sensor in the mobile phone is generally around 30mm^2. The sensor size of the full-frame camera is 24mm×36mm, which is 864mm^2. The aperture coefficient of the mainstream mobile phone camera is generally around F2, and we also calculate the camera according to F2.

Then, under the aperture of F2, we can get that the average wavelength of light is 580nm, and the pixel size at the diffraction limit is 1.4μm, that is, the pixel area is1.4μ m 2, which is 864mm^2 brought into mobile phones and full-frame cameras by 30mm^2. We can get that the effective resolution of the mobile phone lens is 65438. The effective resolution of the camera lens is 400 million pixels, but in fact, the resolution of the 1 10,000-pixel mobile phone sensor is much larger than that of the mobile phone lens, and the effective resolution of the camera sensor is much smaller than that of the lens, so no matter how high the resolution of the mobile phone camera sensor is, its actual resolution can at most catch up with the level of SLR 10 years ago.

However, there are so many extra pixels in the camera sensor of the mobile phone that it is completely useless? Not really!

The above determines that a full-frame camera with a larger lens and a larger sensor will definitely have better picture quality than a mobile phone.

In addition, there is the problem of resolution. The lens is not an ideal optical system, and there will be phase differences including spherical aberration, coma, astigmatism, field curvature, distortion and dispersion. If these aberrations cannot be controlled, sharpness and resolution will be reduced. Because of the large longitudinal space of camera lens, multiple groups of lenses can be inserted to correct these aberrations, which makes the imaging quality very good. However, the vertical space of the mobile phone lens is small, so it can't hold so many groups of lenses, so the aberration is relatively large, the clarity and resolution are relatively low, and the imaging quality is not as good as that of the camera!

This is why the picture quality of mobile phones can never be compared with professional SLR or single battery!

SLR is good, no matter how big the mobile phone is, it can't compare with the photosensitive element of SLR, which is not an order of magnitude and can't be compared. The only comparison is portability.

I find this metaphor hard to separate. What is the understanding of Quan Huafu SLR? This must be understood.

Quantu means Wang Zhongwang in photography, which is a technical term.

The phrase "the bottom kills people" has always been the truth between the ghosting and the whole picture.

Many hardcore players have the whole picture in their hands.

Take Nikon SLR as an example. Looking at the whole picture, some people who have no money can buy D750 with more than 20 million pixels and use it with relish. And they seldom complain why they don't go to D8 10, because Bayi's is a high pixel machine;

It is also true that Z6 has fewer pixels than Z7, but Z6 is hotter than Z7, which also shows that pixels are not an absolute selling point.

Therefore, in the comparison between mobile phones and SLR, only the outsole can completely win. This CMOS is like a coaming in a bucket, and CMOS is the most critical part to determine the amount of water in the bucket.

As for the pixels, in the absence of outsole, the shooting quality can't be compared with the more than 20 million pixels of outsole. Taking pictures is the pursuit of image quality. Only with a big bottom can a big country invest lightly. Not as big as a billboard. This is not a comparison.

I think it's flattering to compare a mobile phone with Quan Huafu. He can take down the digital card machine and compare it with the residual frame. Quan Huafu is a very high-end professional equipment in SLR. If the CMOS of a mobile phone is only the size of a soybean, I don't think the mobile phone will turn over one day unless it encounters black technology.

The mobile phone just wants to grab the job of SLR! Don't blame the SLR for putting a mobile phone in [wit]