OPPO Find X Review: Camera
Author:Soomal
Source:eng.soomal.com

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Find is the flagship series of OPPO, but for various reasons, this series has been paused updated for several years. Until this year, Find was restarted. The Find after the comeback was named Find X. As you can see, it is amazing, no doubt, one of the most popular models. Its dual-rail lifting structure hides the front and rear cameras in the fuselage. Does this design have a positive or negative impact on imaging?

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    Type: Mass produced
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Lens, Focus and Metering

Overview

Find X uses a lifting design, and the front and rear cameras are mounted in the lifting mechanism. Its body thickness is 9.6 mm, which is thicker in current mobile phones, and the thickness of the lifting mechanism is less than 7 mm. The design space of the camera is actually quite limited. The slim space will compress the focal space of the camera, which is unfavorable for edge imaging.

Find X uses a rear dual camera design, the corresponding total pixel of the CIS is 16MP and 20MP, the model is unknown. The lens aperture is F2.0, integrated optical anti-shake system, in such a thin space, this seems to be the limit. The equivalent focal length of the lens is about 24 mm, which has a wider field of view than the mainstream 26-28 mm, but this is not advantageous for edge imaging. Find X's dual camera design blurs the distinction between the main and the deputy, 16MP one this should be to cope with the sunny scene, and 20 million this is for the low light scene, the system automatically switches, cannot manually intervene.

Its front camera uses a 25MP sensor. Similar to the front of the iPhone X, it is also a structured light-based design that enables a high-security face verification service. In the selfie, it is also possible to provide a portrait light effect similar to the iPhone X based on the principle of structured light modeling.

Auto-Focus

Brands=VIVO;Model=VIVO NEX S;Focal Length=4mm;Focal Length In 35mm Format=30mm;F-number=F1.8;Metering Mode=Center Weighted Average;ISO Speed=ISO193;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/100seconds;Exposure Program=Not defined;Scene Capture Type=Standard;DateTime=2018.09.08 11:55:29
Brands=OPPO;Model=OPPO FIND X;Focal Length=4mm;Focal Length In 35mm Format=0mm;F-number=F2.0;Metering Mode=Center Weighted Average;ISO Speed=ISO135;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/50seconds;Exposure Program=Not defined;Scene Capture Type=Standard;DateTime=2018.07.21 18:21:54

OPPO official website does not deliberately emphasize the dual-pixel focusing system as before. If it is simply contrasting the focusing speed, it is really slower than the NEX S, S9 and other models, but with the support of the pre-focus system, the gap is not obvious. Most of the time it can be ignored, and the experience in this part is quite good.

Brands=OPPO;Model=OPPO FIND X;Focal Length=4mm;Focal Length In 35mm Format=0mm;F-number=F2.0;Metering Mode=Center Weighted Average;ISO Speed=ISO261;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/33seconds;Exposure Program=Not defined;Scene Capture Type=Standard;DateTime=2018.09.19 15:38:00
Brands=VIVO;Model=V1809A;Focal Length=4mm;Focal Length In 35mm Format=29mm;F-number=F1.8;Metering Mode=Center Weighted Average;ISO Speed=ISO171;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/100seconds;Exposure Program=Not defined;Scene Capture Type=Standard;DateTime=2018.09.19 15:34:14

Find X's focus problem is logic optimization, its AF range is small, and it will not search for the right focus in the mid-court area. For example, the contrast of the group is obvious, but Find X does not hesitate to focus on the background, and the contrasting model focuses on the leaves. Because of this problem, the frequency of manually setting the focus is increased, and the experience is reduced.

Metering

Brands=OPPO;Model=OPPO FIND X;Focal Length=4mm;Focal Length In 35mm Format=23mm;F-number=F2.0;Metering Mode=Center Weighted Average;ISO Speed=ISO100;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/907seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.08.21 14:35:53
Brands=OPPO;Model=OPPO FIND X;Focal Length=4mm;Focal Length In 35mm Format=23mm;F-number=F2.0;Metering Mode=Center Weighted Average;ISO Speed=ISO100;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/1102seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.08.21 14:04:38
Brands=OPPO;Model=OPPO FIND X;Focal Length=4mm;Focal Length In 35mm Format=0mm;F-number=F2.0;Metering Mode=Center Weighted Average;ISO Speed=ISO2032;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/20seconds;Exposure Program=Not defined;Scene Capture Type=Standard;DateTime=2018.08.11 12:10:38

Find X default metering is the central average mode. In fact, today, more and more intelligent, it is not a rare thing to perform metering optimization according to the scene, so what metering mode is no longer important, the important thing is the result. OPPO's mobile phone metering has always been radical and Find X has been significantly improved. In sunny scenes, white objects overflow much less, so more highlight details are retained. However, the low-light scene is still not ideal, and there will still be a tendency to be radical.

Like most mobile phones, Find X provides focus and spot metering linkage, touching screen to activate. It is used to cope with scenes where the metering is not suitable. The sensitivity of the linkage is too large, which has a great impact on the result. The exposure compensation tool is provided in the automatic and professional modes, providing a compensation range of plus or minus 2 EV, stepping 0.17 EV.

Find X also has a face-priority focus and metering mode. When a face is recognized, face metering is prioritized, and then HDR is used to ensure the details of the background. This mechanism is the same as that of vivo, and now more and more mobile phones has a similar function. Find X has a small problem. It occasionally recognizes faces in the bushes and grasses, which can cause problems in metering and focusing.

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