Xiaomi 8 photography is blurred

Small aperture can't get the depth of field effect, and mobile phone lens can't change the aperture. Take it far away and it will be clear.

Let me throw a brick to attract jade for the landlord to popularize science.

This is the effect of large aperture depth of field, which has nothing to do with focusing. You can clearly photograph an object, and the evidence is that the focus is off. As for the other one, because your aperture is very large (the aperture of the mobile phone can only be opened to the maximum), the two objects are not in the same focal plane, so it can't be closed.

No matter whether it is a mobile phone lens or a camera lens, once it is focused, the objects in the focal length are clear, just like taking your mobile phone lens as the center point, the objects on an arc within the visual range of the lens can be focused, otherwise it is virtual focus if it is too close or too far away, but this is only relative, not absolute. If you are close to the focal length, the smaller the error of this value and the smaller the distance, it will cause virtual focus. On the contrary, if you take it far, the error of this value will be great, and you can basically focus at a long distance, so I suggest you take it as far as possible.

Whether the virtual focus is also related to the aperture size. The depth of field should be mentioned here. Simply put, the larger the aperture, the shallower the depth of field, and only the distance in focus is clear, and it is blurred outside the focus; On the other hand, under the same conditions, if the aperture is small, the depth of field will be large, and it will be clear for Jiao Wai at a distance. Because the aperture of the mobile phone cannot be changed, it can only be opened to the maximum by default. Like the photo of the main floor of your building, if the SLR is above F2.8, the depth of field is very shallow, that is, only one can be clearly depicted, while if it is below F5, the depth of field is very large, and both of them are very clear. However, the mobile phone can't change the aperture, and the maximum aperture is turned on by default, so the depth of field for taking close-up photos is shallow. This has nothing to do with any double lens. The "depth of field" of a mobile phone is digitally post-produced, which is completely different from the depth of field of a SLR. You can fool Xiao Bai, but you can't get on the table.