What does HDR mean in the lens?

HDR (High Dynamic Range Imaging, English: HDRI or HDR) is a set of technology used to achieve a larger exposure dynamic range (that is, a greater difference between light and dark) than ordinary digital imaging technology.

The purpose of high dynamic range imaging is to correctly represent the brightness in the real world from direct sunlight to the darkest shadow. Simply put, it is to make your photos clear whether they are highlights or shadows.

Extended data:

The difference between camera HDR function on and off;

When a photographer wants to shoot a work with a large light ratio, he can turn on the HDR function of the camera and reduce the light ratio, thus creating the effect of underexposure of highlights and underexposure of dark tones. After opening, you can distinguish the outline and depth of the object.

In the environment of large light ratio, ordinary cameras cannot record extremely bright or dark details due to the limitation of dynamic range. The photos processed by HDR program, no matter the highlights or dark parts, can get a better level than ordinary photos even if they are taken at a large light ratio.

With the help of the camera HDR function, we can use color values beyond the normal range, so we can render more realistic 3D scenes. With this function, we can break through the limitation of tolerance and take the detail level of photos to a new height.

References:

Baidu encyclopedia -HDR