Samsung Galaxy S9 Review: Camera
Author:Soomal
Source:eng.soomal.com

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Photographing is an important selling point of S9. At its global conference, it took quite a long time to explain the camera part. It can be seen that Samsung placed great expectations on the S9's camera. The official statement is that the S9's camera is "redesigned." Samsung's flagship model has always been a benchmark in the industry. How far can the S9 progress?

  • Source: Self-purchasing
    Type: Mass produced
    Commercial Relationship: No
Lens, Focus and Metering

Overview

From iFixit.com

S9 uses a switchable aperture design, with two apertures F1.5 and F2.4, of which F1.5 is the largest aperture in current mobile phones. According to the official saying, this is a bionic design, and the human eye will zoom under different lighting conditions. A large aperture corresponds to a low-light scene, and a small aperture corresponds to a light scene. In our opinion, the greatest benefit is the better edge imaging quality that is expected in sunny days. In particular, this aperture is a physical aperture, not a virtual aperture, and it is wrong that some readers who ridicule the S9 with only two apertures.

There are multiple hardware configuration versions of the S9. Soomal purchased the licensed version of the Chinese mainland [SM-G9600]. This version uses the Qualcomm Snapdragon 845 and the camera's corresponding sensor is the Sony IMX345. We also have a S9+ [SM-G965N] that readers send to test, and the sensor uses Samsung's own SAK2L3. The performance of different hardware platforms may not be the same, so please do not simply equate the versions of different hardware platforms.

The IMX345 has a total pixel size of 12 million pixels and dimensions of 1/2.55 inches. It integrates LPDDR4 DRAM and ISP [Image Signal Processor] underneath the sensor to form a new stack structure. This structure can improve data transmission efficiency and processing efficiency. Based on this hardware basis, S9's multi-frame synthesis sample frame counts up to 12 frames, while others usually only 4 frames, more samples mean more available information.

More technical details on the IMX345 we do not know, but it is certain that the camera is the top priority of the S9, in the official "bright spots" page, the camera accounted for most of the space.

Auto-Focus

Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Center Weighted Average;ISO Speed=ISO50;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/100seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.04.08 17:24:24
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Center Weighted Average;ISO Speed=ISO50;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/970seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.04.24 15:23:07
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F1.5;Metering Mode=Center Weighted Average;ISO Speed=ISO200;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/120seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.03.19 19:42:45
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F1.5;Metering Mode=Center Weighted Average;ISO Speed=ISO250;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/17seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.03.18 18:10:00

The S9's CIS integrates a full-pixel dual-core focusing system. Focusing is very fast and accurate, one of the fastest is the current. The pre-focus algorithm responds sensitively, and the scene changes slightly and will immediately refocus. The scene is not picky. In most scenes of daily life, focusing can be done efficiently. Soomal shot thousands of proofs. The phenomenon of inexplicable defocusing is almost non-existent. Approximately 25% of the center of the viewfinder will be focused primely, and the focus will be given priority in this area. The S9's focus also has some intelligent optimization. It will try to determine the intention of the user. For example, after the system finishes focusing, the user slowly changes the composition and biases the subject to make it conform to the three-dimension composition method. S9 usually locks the focus subject rather than focusing on the center area again. The S9's focusing experience is excellent, fast, accurate, and easy to use.

Metering

Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Center Weighted Average;ISO Speed=ISO50;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/1337seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.05.03 14:47:04
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Center Weighted Average;ISO Speed=ISO50;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/1378seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.05.03 15:15:29
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Center Weighted Average;ISO Speed=ISO50;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/932seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.04.14 11:25:13
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F1.5;Metering Mode=Center Weighted Average;ISO Speed=ISO250;White Balance=Auto;Exposure Bias Value=0.0EV;Exposure Time=1/28seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.03.19 18:43:27

The S9's default metering mode is the center-weighted mode. In most scenes, the correct exposure value can be obtained. Under bright light scenes, white objects may have slight overflows. Note8 is also true, but the S9 control is better. The metering result is controlled properly under low light, and the exposure value is not deliberately increased. The light metering result is close to what your eyes can see. Under relatively complex lighting conditions, good metering can also be achieved. S9 supports focus and spot metering linkage. Touching the screen during viewfinder activates this mode. The linkage sensitivity is low and it is easy to master to prevent excessive influence on the metering results. If "Auto focus tracking" is enabled, the linkage function will be blocked.

Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Spot;ISO Speed=ISO80;White Balance=Auto;Exposure Bias Value=-2.0EV;Exposure Time=1/100seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.04.07 14:34:20
Brands=SAMSUNG;Model=SM-G9600;Focal Length=4mm;Focal Length In 35mm Format=26mm;F-number=F2.4;Metering Mode=Spot;ISO Speed=ISO50;White Balance=Auto;Exposure Bias Value=-2.0EV;Exposure Time=1/453seconds;Exposure Program=Normal program;Scene Capture Type=Standard;DateTime=2018.04.08 16:00:25

No camera or cell phone can handle metering of all scenes, so it is necessary to remain exposure compensation tools. The S9 offers exposure compensation tools in both automatic and professional modes, with an exposure compensation range of plus or minus 2EV and stepping 0.1EV. The picture above is using the exposure compensation tool to complete the shooting.

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