影音娱乐
Passage De Venus (1874)
来源：Internet Archive 公有领域影视（美国版权到期或未续期作品）。年代：1874。导演/制作：P.J.C. Janssen。The 1874 passage of Venus over the face of the sun was very popular with scientists. Many expeditions to the best viewing points in the world were organized; at least 62 parties would visit 80 locations. In preparation much effort was made to find the best techniques to get objective and permanent records of the event. Frenchman inventor Janssen came up with the idea for a "revolver photographic". This huge camera sy…请遵守原站许可与版权说明，仅用于学习与个人欣赏。
