The observation feature of photography art is actually how to discover knowledge.

The observation characteristics of photography art are actually how to find and understand light, how to understand light, how to understand light and how to use light.

The word photography comes from the Greek word φ? English: phos (light) and γ ρ α φ ι English: graphis (painting, sketch) or γ ρ α φ? Graphê together means "painting with light". Photography refers to the process of recording images with some special equipment. Generally, we take photos with mechanical cameras or digital cameras.

Sometimes photography is also called photography, that is, the process of exposing a photosensitive medium by using the light emitted or reflected by an object. Someone once said an incisive language: the photographer's ability is to transform the fleeting ordinary things in daily life into immortal visual images.

In June 2020, the National Copyright Administration issued the Notice on Standardizing the Copyright Order of Photographic Works, which clarified the copyright issues related to photographic works, intensified the copyright rectification in the field of pictures, and promoted the construction of a long-term mechanism for copyright protection of photographic works.

When taking pictures, light enters the cassette through a small hole (more often, a lens group) and forms an image on the medium on the back of the cassette (relative to the incident direction of light). According to the actual light intensity and the photosensitive ability of the medium, the required light time is also different. In the process of illumination, the medium is irradiated by light.