Hermann Wilhelm Vogel (1834-1898)
Hermann Vogel, a German photo-chemist, discovered the effects of dye on photography emulsions. In early photography, emulsions were sensitive only to blue and white light. Vogel made a major contribution when, in 1873, he discovered that if he added dyes the plates would respond to green light (for landscape photography). This led to the manufacture of "orthochromatic" plates. This photo is inscribed from "your old friend H. Vogel."
- 1870 circa 5 years
- Original Format:
- Glass Negative Print
- download hi-res watermarked image
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