African American soldier with wife and daughters 与妻子和女儿一起的非裔美国士兵 1851/2 – Introduction of the Ambrotype process by Frederick Scott Archer and Peter Wickens Fry (1795- 1860) a London solicitor. Cheaper than the daguerreotype, the ambrotype is a glass negative with a dark backing which allows it to appear as a positive. 1851/2 ——弗雷德里克·斯科特·阿彻（Frederick Scott Archer）和伦敦的一名律师彼得·威金斯·弗莱（Peter Wickens Fry）（1795-1860）介绍了安布罗摄影法的制作过程。安布罗摄影法比银版照相法便宜，它是一种有黑色背衬的玻璃底片，可以让它看起来像是一个正片。 未经授权，不得转载！ |
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