Microphotograph
（重定向自Microphotography）
![A 1 mm diameter microphotograph, ca. 1858[1]](/uploads/202501/27/Mental_hospital_Philadelphia_PA_micrograph_by_Langenheim_&_Co._ca._18580545.jpg)
Microphotographs are photographs shrunk to microscopic scale (see microfilm) – not to be confused with photomicrographs, which are photographs of microscopic things. Microphotography is the art of making such images. Other applications of microphotography include espionage such as in the Hollow Nickel Case.