Z50 M gear can be focused in the dark, but it can't be centered with S gear.

It may be because the single setting of M-range is incorrect, or because there is no distinction between light and dark, and there is no corner, so autofocus can't work.

First, the solution:

1. If the individual settings in the M file are wrong, you can clear all the custom functions in the menu and restore the factory settings.

2. If autofocus can't work because there is no light and dark, and there are no corners, then now autofocus of SLR is to find the "contrast" of the object, the contrast of light and dark, the edge of the object and so on. , so you can find the edge of the cloud in the sky to focus on.

Second, the m file:

M range is also called manual mode, that is, turn the dial of the camera to M position. At this time, you can manually adjust the aperture, shutter speed and ISO sensitivity according to your own needs.

Third, the S file:

S file is also called shutter priority automatic exposure mode. By selecting S, the shutter speed can be controlled, and the aperture changes with exposure. Generally speaking, in order to shoot motion, the shutter speed of shooting motion is faster, and the shutter speed of shooting running water is slower.