Can I take pictures with my mobile phone? What are so many mobile phone cameras for?

There are more and more mobile phone cameras now. From double shooting to three shooting, to four shooting, even some mobile phones are just like centipedes in Journey to the West.

Although I think a little camera just makes up the number, the number of cameras is still very important for the current mobile phone technology to achieve multi-focus collaboration.

Generally speaking, the most important camera of a mobile phone is called the main camera. The largest sensor is often used. Generally, a standard wide-angle lens is around 24 mm-28 mm ... at present, it is concentrated around 24 mm.

Take pictures of scenery, daily life and close-up. It can be said that it is a very common lens.

The second camera is usually a super wide-angle camera. Now manufacturers also attach great importance to this camera and often give it a better sensor. Even the same as the main lens. Form the so-called double main beat. The 35mm equivalent focal length of the lens is about 14mm. Like Xiaomi, I like to play more widely.

Actually, I think telephoto is more practical than super wide angle. However, due to technical problems, all mobile phone manufacturers without exception, the second camera is super wide-angle.

Third camera Different mobile phones have different pursuits.

For example, the general non-photographic flagship mobile phone, the second camera is often about twice as large as the medium focus lens.

Simply put, it allows you to shoot scenes a little farther away.

If it is a camera phone, remember that this is 202 1 year. I think if you say that you are a flagship camera phone or even just a camera phone these days, you should still focus on the camera card or the periscope telephoto camera, whether it is 5 times or 10 times.

This will allow you to shoot further.

Especially shooting scenes like sunrise and sunset requires a telephoto.

And speaking, 10 times is naturally better than 5 times.

Remember, it's 202 1 year, and the periscope camera has officially appeared on mobile phones for the third year. Photography flagship mobile phone, telephoto is basic.

The fourth camera is not available in every mobile phone. Generally speaking, it pays special attention to the camera function of mobile phones. 5 times periscope telephoto mobile phone can be equipped with 2 times lens. As a transition between 1 times and 5 times. 1 0x periscope telephoto mobile phones are generally equipped with 3x lens as the transition from10x to10x.

For example, vivo is very smart, equipped with twice the camera and optimized for portraits. The effect is excellent.

So I think there are four cameras before the real optical zoom of the mobile phone is realized-super wide angle, wide angle main camera, periscope telephoto and medium focus, which I think is a more suitable device.

If you take a camera for example, a super wide-angle zoom lens is a large three-dimensional super wide-angle zoom lens (16-35 F2.8). The main camera is a standard zoom lens (24-70 F2.8). The telephoto of periscope is (70-200 F2.8). The middle focus is the header or portrait header (50F 1.4 or 85F 1.4).

I think this is understanding.

In this case, do you think it is more necessary to have four lenses for a camera phone?

So the question is, how do we use different lenses? When I say use, I mean it.

In fact, this is the "zoom function" of the mobile phone.

The method is simple. We can open two fingers or pinch two fingers. When the mobile phone is in shooting mode, we will find that the picture is enlarged or reduced with our actions. Enlarging means that the focal length becomes longer, and shrinking means that the focal length becomes shorter.

The long focal length can be shot farther, and the short focal length can be shot wider. This can be seen intuitively in the mobile phone viewfinder.

In addition, there is another method. In the mobile phone shooting interface, we can also see numbers on the side and bottom.

For example, in this interface, 1 is displayed on the right, which is 1 times of the main shot. We can click and slide up and down to zoom. You can also click other "points" and jump directly to a gear such as 0.6 super wide angle.

Many people have said before that the effect of finger sliding and clicking is different. In fact, it looks basically the same now.

So what is the so-called difference?

Because at present, mass-produced mobile phones can't achieve optical zoom, they all switch zoom through multiple fixed-focus lenses. The focal length between fixed-focus lens and fixed-focus lens is digital zoom optimized by algorithm.

For example, your mobile phone has 1 times the main camera and 2 times the medium focus. 1.5 times? In fact, it is 1 times the digital zoom of the main camera. That is, shooting with 1 times the main camera, and cutting to narrow the visual range, as if zooming. In principle, it is the same as your later cutting. However, because of the optimization of the algorithm, it may be slightly better than direct cutting.

There was a saying before, that is, the 2x zoom that directly slides with two fingers will not mobilize your 2x camera, but only cut the main camera. Only when you click twice an hour, it is a real double zoom. But for this year's mobile phone, at least I have used it, and I have not found such a situation.

Next, I want to say a bad account.

Let's assume a mobile phone. This phone has 1 times the main camera, 0.6 times the super wide angle, 3 times the medium focus, and 10 times the periscope telephoto.

If we adjust it to 2.9 times when shooting, it feels just right.

Then, in theory, three times medium coke can't be used-it's not wide enough. The picture can be deleted, but it cannot be added. So this 2.9 times is achieved by using 1 times digital zoom of the main camera.

What's wrong with that?

Popularize a little knowledge first. We may all have heard that a mobile phone has 64 million pixels, or even 65.438+0 billion pixels. But you have to understand that this often means 1 times the main beat. Different cameras have independent sensors behind them, and the pixels are different.

This year, many mobile phones have so-called dual main cameras, and the enhancement is also super wide-angle. So for example, the 1 times main camera of this phone is 64 million pixels. It is possible that the12 megapixel sensor is equipped with a focal length of 3 times.

Go back to what I just said. For example, we adjust the zoom to 2.9 times. At this time, we use the 64-megapixel sensor of the main camera for cutting. Use a medium focus less than 12 million pixels.

Does it look nice?

Let's calculate the consequences of digital zoom. 2.9 times zoom, such digital zoom is at the expense of pixels.

Fold into an area smaller than a square first.

2.9 2.9=8.4 1

See how many pixels are left.

64 million pixels 8.4 1=76 1 10,000 pixels

Now your mobile phone is post-enhanced with 76/kloc-0.0 million pixels.

But if you zoom to 3 times, it may be called12 million medium focus lens.

You may have said three times that it's not my range. In fact, there is little difference between 3 times and 2.9 times. A visual range of 2.9 times is really necessary. Maybe you just need to step back.

So we can probably get the first small conclusion:

Try not to "fill" the digital zoom.

However, I may hit myself in the face soon.

For example, another mobile phone, super wide angle, 1 times the main camera, 2 times the medium focus and 5 times the telephoto.

The main camera has 64 million pixels, twice as many as12 million pixels.

If I want to zoom 1.9 times, do I have to take a step back? How about using a double camera directly?

It's actually quite simple. Let's zoom in twice.

2 2=4

64 million pixels 4 =16 million pixels

Even if magnified to 2 times, the main camera is still clear! Unless your 2x lens is specially optimized or has higher pixels.

This is the reason why the vivo X series 2x lens is widely praised, and why Xiaomi 1 1 Ultra does not have an independent 2x lens-the main camera is very powerful and the cutting is good.

So we get the second small conclusion:

Not all "digital zoom" is inferior to "pure optics".

If it is a small zoom with a good sensor, it may not be bad. So there is no need to regard digital zoom as a scourge. You must use "pure optics" in the distance. After all, there is a big difference between sensors.

Is it a foolish account?

There are even more confusing things, such as Huawei mobile phones. Although it is equipped with a 3x camera, you can try to shoot a distant scene 2.8 times or even 2.6 times. In fact, it is also called a 3x camera. Although the main camera is 1 times, it is still 1 times when it is 0.8 times. But the actual shooting experience is not bad.

Therefore, in my opinion, mobile phone manufacturers with normal brains can clearly realize this problem. For example, the main camera of Xiaomi 1 1 Ultra uses an oversized bottom. If you have to add a 2 times medium focus lens, you don't need a good sensor, and you won't give it at all. Cut directly with the main camera.

What is really needed, such as the dual lens of vivo with 32 million pixels, is high enough. But also optimized for portrait shooting. So existence is really meaningful.

Now that the manufacturer has thought it over, we can draw a third conclusion:

Use the zoom function provided by the mobile phone. Don't worry too much whether you use optics or add some digital zoom. Just try to avoid extreme digital zoom.

Having said so much. To fully understand, you still have to try it with your mobile phone.

In fact, I hope you can remember the following points after reading this article:

1, buy a mobile phone, if you really look at the photography function, then telephoto is necessary. The lens is really good for four people-there can't be numbers yet.

2, mobile phone multi-camera is to provide you with zoom function, you have to use it! It's easy to use!

3. Try to avoid extreme digital zoom.