What is pure photography and f64 group?

Before pure photography appeared, Impressionism was popular, and the pictures imitated Impressionist painting.

like this

Well, this is indeed a photographic work, or 1857.

Later, film became popular, cameras became smaller and smaller, and the quality was improved. People don't want to continue taking pictures like painting.

Change to direct shooting without disturbing the subject. The picture is also more concise and pure. This is pure photography.

Later, some people were not satisfied with pure photography and demanded that the photos be very delicate and clear. These people like to use small aperture and large format cameras.

F64 is the smallest aperture, which became the name of their organization.