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Optical zoom in OnePlus 7 Pro or marketing at the interface to photography



Marketing departments beautify reality professionally. If white, then only Vizir (whiter will not be), if beer is just Lech (and a story about Leszek flowing on the street), and if … you can add a sequel. From time to time, however, the marketing grenade ignites the producers in the face. Why am I writing about it in connection with OnePlus 7 Pro ? Well, here too, the manufacturer has broadened the reality to make it look better on the sales side. According to Android Police, the user who introduced himself to Reddit as ImKuya found the inconsistency of the long-focal camera parameters with his specified ones.

Let me remind you what the optical system in this model looks like in the manufacturer's declaration. It consists of three cameras:

  • Main Camera: Matrix 48 Mpix, 1
    /2 ", Wide Angle Lens with 1: 1.6 Brightness and 26mm Focal Length,
  • UWA Camera: 16 Mpix Matrix, Wide Angle Lens with Brightness f / 2 , 2, and the equivalent of 13mm focal length,
  • Tele: 8 megapixel telephoto with f / 2.4 brightness and 78mm focal length (equivalent to exactly the triple focal length of the main camera) [19659006] Let's leave the subject for a moment in which the producers passionately declare that their products have an optical zoom, they do not have.Zoom means the possibility of gently changing the focal length of the lens by moving the lens assemblies.No of the smartphones (except the old Samsung experiments) can currently be used Instead, the new models offer multiple focal lengths and a flexible change between them.All "zoom" intermediate values ​​are achieved by digitally processing images of multiple lenses and are more or less lossy, although the advances in image processing algorithms may make the difference difficult to see.

    And what does this have with OnePlus 7 Pro ? Portrait mode uses the same camera as the telephoto mode. The problem is that when photographing the same object from the same location in portrait orientation, you get a completely different field of view than in telephoto mode. Convince yourself from below:

    The difference is clear, in addition, the camera works in portrait mode with a resolution of 13 Mpix and in telemode only with 8 megapixels. Since the same matrix lens unit is used, the only possibility is that the telephoto mode is created by cutting out the central part of the image from the larger whole. When comparing photos, it is highly likely that the telephoto camera actually has a "zoom" that is closer to x2.2, which is 57 mm.

    The pictures above confirm this scenario, but illustrate it from a different angle. My editorial colleague has taken the second set of photos so the bush on both is as big as possible. As the field of view changed, the location where the image was taken had to be changed. This, of course, also influenced the perspective and what can be seen in the background.

    To complete the confusion, we can use optical stabilization only in telephoto mode, even though we use both telephoto and portrait modes with the same camera . I have doubts about the stabilization method – is it a true optical stabilization, and only the software does not use it in portraiture, or is it the matrix area from which the image is taken? to correctly estimate such treatment of the subject by the producer? Basically, he did not lie to buyers. Explanations speak of the possibility to take close-up shots at 8 Mpix. This is also true. Personally, however, I feel disgusted. Likewise, if somebody sells a telephoto lens to my camera that only works with the central part of the sensor without informing me before I buy it, I would feel it. I would not see a problem if the data were clear with which treatments the manufacturer has achieved the effect. It would be even better if the final decision on photography was left to the photographer. Ultimately, the choice of whether to use the entire matrix or the entire section is not different in its essence, such as choosing a frame format between 4: 3, 3: 2, and 16: 9 – the matrix has a certain size and all the photos With different proportions, rejection must yield some useful data. But none of the manufacturers has forgotten to tell users how to do it …

    Many thanks to Denis Żak for taking up texts. You will soon be able to read the full review of OnePlus 7 Pro from him.

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