Why does the iPhone XR portrait work better than the iPhone XS and the iPhone XS Max?


Why is the iPhone XR portrait performing better than the iPhone XS and iPhone XS Max


Buying iPhone XS and iPhone XS Max users may have to hold back because this iPhone XR light source is far better than the iPhone XS and iPhone XS Max dual lens, but this is due to what causes it. What? This is to tell you.
Why is the iPhone XR portrait performing better than the iPhone XS and iPhone XS Max?

Although the iPhone XS series and the iPhone XR front lens are identical in specifications, both models have a powerful A12 biochip combined with a neural network engine to identify patterns, make predictions, and learn from experience.
Perhaps many users still care that the iPhone XR has only a single lens, and the effect of a single lens must be worse than the iPhone XS series? If you don't close the two, they are all the same quality, unless it is better than the far shot, it will be the advantage of the iPhone XS series dual lens.
But if you only use a single lens and don't zoom in, will the iPhone XS series be better? In fact, this is not the case. I did add a lot of computing technology to the iPhone XR single lens. If I use two iPhone XS and iPhone XR to shoot in portrait mode in a dimly lit room, which one is better? Will it be the same quality or is the iPhone XS better?
John Gruber of Daring Fireball did the test for us. In a poorly lit room in a night, I used the portrait mode to shoot the son who was watching TV. I found that the wide-angle lenses used in the iPhone XR and iPhone XS are both f/1.8. There is a larger sensor that collects up to 50% of the light, but the portrait mode is significantly better than the iPhone XS in the low light environment of the iPhone XR.

Image from: daringfireball website

John Gruber even reminded that he did not post-process the image, or deliberately lowered the brightness of the iPhone XS photo, only converted the HEIF photo to JPEG, the original size does not exceed 2.2MB, and also provides two original Image files iPhone XR  and iPhone XS .
Looking closely at the iPhone XS original image, you can see that the iPhone XS is in a low light state, the particles will be quite serious, and the iPhone XR is not directly pulling up the photo brightness exposure value, the overall picture noise particles are less than the iPhone XS. .

Why is this happening?

The main reason is that when the iPhone XS is shooting in portrait mode, the dual lens will automatically cut the focal length lens f/2.4, but the telephoto lens will be smaller than the wide-angle lens sensor, which will result in less light. If you use a preset camera. App to shoot, users can not freely choose to use wide-angle or telephoto lens in portrait mode, will force the growth of the focal lens, the natural shot will be worse than the wide-angle lens, but the iPhone XR single lens because there is no With a telephoto lens, you can shoot directly using a wide-angle lens.
The details are hidden in the devil. Apple did not use the briefing to improve this in the September iPhone presentation. However, in an iPhone XR video promotion, the scene constantly emphasizes that the iPhone XR is shooting at a low-light source at night. The XS series is good.
In the past, Sebastian Marineau-Mes, vice president of Apple Software, also pointed out in an interview: "We turned the iPhone single lens into mathematics and used images. No one else can do this. Now many of them simply achieve blurred background. Features."
The iPhone XR single lens is similar to Google's latest Google Pixel 3 single-lens technology. The iPhone XR does not have a second telephoto lens. When the zoom is shooting, the picture will be poor when the digital zoom is zoomed out. In the iPhone XS and iPhone XS Max, the lens advantage and the smart HDR function can be perfectly used only in the sunny daytime, but it is the advantage of the iPhone XR single lens when the night is not enough.

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