OnePlus9 Pro rear camera analysis：Image improvement is not limited to Hasselblad's custom IMX789
As the pinnacle of shocking images，OnePlus 9 Pro has come up with four magic weapons，one plus| Hasselblad Vision System，The second is the exclusive customized main camera IMX 789，The third is the wide-angle free-form surface lens，Fourth, the wide-angle uses a larger bottom CMOS IMX 766。
1、one plus| Hasselblad Vision Systems
since birth，Hardware has always been the strength of OnePlus，But in the field of video，At a time when computational photography is becoming more and more mainstream，OnePlus also urgently needs to form a mature tuning standard for image algorithms，create your own style。
if say in the past，OnePlus is crossing the river by feeling the stones，So this collaboration with Hasselblad，Undoubtedly, it pointed out the direction for OnePlus's next video development。With the rich experience accumulated by traditional camera manufacturers in the past 80 years，OnePlus can keep learning as it works with Hasselblad，to avoid detours，Provide users with a mature imaging system。
this time，OnePlus and Hasselblad cooperation image system，There are two main changes，One is Hasselblad natural color optimization，The second is Hasselblad professional camera。The former brings better colors to photos straight out of the phone，The latter refers directly to the professional mode，Strive to restore the original professional process of camera shooting to the mobile phone。
——Hasselblad natural color optimization
all along，The imaging styles of different brands of mobile phones are very different，Most of the time, mobile phone photography is not 100% restoring the truest color，Instead, it shows what the engineer thinks is the best color，Therefore, there will be more blue when shooting the sky、Greener when photographing plants、When shooting food, the color is more vivid and mouth-watering...for different scenes，Use different color schemes，So that the photos you take are the most palatable。
certainly，There are also manufacturers and users who prefer exact restoration，For example, the iPhone series tends to pursue reality。This is what suits the person。
And on top of Hasselblad color optimization blessing，OnePlus9 Pro did not blindly pursue color adjustment or so-called optimization，but on the basis of natural restoration，be strengthened appropriately，seek a balance，What's more, there are RAW for deep digging。
This time the Hasselblad natural color optimization is so，After professional calibration of the sensor，OnePlus joint Hasselblad camera，Hasselblad Ambassadors objectively and subjectively tuned for hundreds of scenarios，From Hue to Saturation、Brightness is adjusted，Strive to restore the color performance that matches Hasselblad on OnePlus9 Pro。
——Hasselblad professional camera
UI style based on Hasselblad，OnePlus develops Hasselblad Pro mode，Brings the options of a professional camera to your phone。Users can freely adjust all core parameters，including ISO、exposure time、Detailed values such as white balance。
also，This professional camera also supports peak focus function，with its help，During manual focus, you can better judge whether the focus is accurate according to the edge of the screen image。
certainly，The professionalism of Hasselblad Professional mode is not limited to the surface，in this mode，OnePlus9 Pro can directly shoot DNG RAW original film with 12bit color depth。in this mode，Not only has the same color performance as Hasselblad professional cameras，High color depth will also bring more freedom for users' post-processing。
Compared with the traditional 8bit color depth，The common more high-end 10bit color depth is 64 times of it，The 12bit color depth supported by OnePlus9 Pro has achieved as much as 64 times improvement in color fineness compared with 10bit color depth.，Just like high-resolution images have more cropping space，High color depth images also have the same advantages in post space。12bit color depth RAW after retouching，Can still guarantee the continuity of the color without discontinuity，This is especially important when shooting large areas of solid color scenes such as starry sky。
2、Custom main camera IMX 789
this time，OnePlus 9 Pro is equipped with an exclusive custom main camera IMX 789。
In terms of specifications，Its characteristics are very similar to the previous generation IMX 689，Adopt 2×2 OCL photosensitive technology，Possesses the strongest omni-directional focus and low-light shooting capabilities in mobile CMOS，And supports HDR video shooting and dual native ISO。
The biggest change of IMX 789 is the size。The ratio of IMX 689 is traditional 4：3，CMOS size is 1/1.43 inch，Single pixel size is 1.12 microns。IMX 789 is further increased on the basis of the former，Scale changed to 16 : 11，The size has come to 1/1.35 inches，Equivalent to IMX 689 elongated to both sides。
therefore，when taking pictures，The IMX 789 will use 4：3frame work。At this time, the CMOS area involved in imaging is exactly the same as that of IMX 689，That is, when taking pictures，It is equal to an IMX 689。The only difference is，The performance of this CMOS is more powerful，Support 12bit color depth original film output in professional mode。
The purpose of increasing the size is to improve the video shooting effect。at 16 : 11under the ratio of，IMX 789 can use more effective CMOS for video shooting。
Larger area effective CMOS，Can improve the quality of the video，It also makes it possible to shoot 4K 120Hz video。also，It also supports up to 8K 30Hz video shooting，Two kinds of high-standard video support，This enables OnePlus9 Pro to have more space for post-editing in video creation，Very convenient for shooting various materials。
3、Freeform lens and IMX 766
On the OnePlus9 Pro，The image configuration of the dual main camera also continues，and，Both CMOS and lens quality of wide-angle lens have been greatly improved。Upgrade from IMX 586 to IMX 766，The wide-angle lens is also further developed in the direction of large bottom and large pixels，Can bring better low light shooting effect。
on camera，OnePlus9 Pro is also equipped with a free-form lens that has just emerged in the mobile phone field。Compared to traditional spherical lenses，The curvature of the free-form lens surface is continuously variable and has no symmetry requirements，through irregular free surfaces，It ensures that the light hits the sensor vertically，Thus, while maintaining a wide viewing angle，Minimize picture distortion。
According to the test，This time, the OnePlus9 Pro has achieved an ultra-wide viewing angle with an equivalent focal length of 14mm.，Distortion is only about 1%，Much lower than 20% of conventional wide-angle lenses。and，Thanks to the blessing of the free-form surface lens，The effect of the wide-angle macro function is also closer to that of a dedicated macro lens，There will be no severe distortion。
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