Daguerreotype
Morse met the inventor of the daguerreotype, Louis-Jacques-Mande Daguerre, in Paris in January 1839 when Daguerre's invention was announced [2]. While the daguerreotype fascinated Morse, he was concerned about how the new invention would compete with his telegraph. However, Morse's viewing of the daguerreotype alleviated his fears when he saw how revolutionary its technology was. Morse wrote a letter to his brother Sidney describing Daguerre's invention, which Sidney then published in the New-York Observer on April 20, 1839. While this was not the first report of the daguerreotype to appear in America, it was the first in-person report to appear in the United States.
John C. Moss
The weakness in the process came from the fact that the finished photograph had to be framed behind sealed glass to prevent oxidation of the silver, which would cause the photograph to deteriorate. Each image was unique and no copy could be made. This was largely why the daguerreotype became obsolete within 20 years of its invention.