Malmberg, Carl Jacob (1824-95), Swedish photographer, born in southern Finland, who began working in St Petersburg in the late 1840s. Initially a daguerreotypist, he learned the negative/positive process after settling in Stockholm in the early 1850s. He took portraits, cityscapes, and views of early industrial landscapes. A technical pioneer and inventor of an early half-tone process, Malmberg was also notable for his association with the gymnastics movement founded by Pehr Henrik Ling and, in the 1880s, for gymnastic studio photographs used as the basis for illustrative drawings. He worked finally in Skövde, southern Sweden.
— Jan-Erik Lundström
