© Courtesy of the C. V. Starr East Asian Library, Columbia University.

Advertisement

標準露光儀 — 高維祥，林澤蒼 — 發明, Standard exposure meter, invented by Gao Weixiang, Lin Zecang

Keywords: photography, invention, technology,

(mentioned in advertisement), 中國攝影供應社 Zhongguo she ying Gongying she (mentioned in advertisement), 高維祥 Gao Weixiang (mentioned in advertisement),