Dagron is also considered the inventor of the miniature photographic jewels ( French : Bijoux photographiques microscopiques ) known as Stanhopes .
A modified Stanhopes lens is used to view the microscopic picture attached to the lens .
Dagron is also considered the inventor of the miniature photographic jewels ( French : Bijoux photographiques microscopiques ) known as Stanhopes because a modified Stanhope lens is used to view the microscopic picture attached to the lens .