John Henry Dallmeyer (6 September 1830 – 30 December 1883), Anglo-German optician, was born at Loxten, Westphalia, the son of a landowner.

[1] Dallmeyer's position in this workshop appears to have been an unpleasant one, and led him to take, for a time, employment as French and German correspondent for a commercial firm.

After a year he was, however, re-engaged by Ross as scientific adviser, and was entrusted with the testing and finishing of the highest class of optical apparatus.

[1] Dallmeyer's instruments achieved a wide success in Europe and America, taking the highest awards at various international exhibitions.

About 1880 he was advised to give up the personal supervision of his workshops, and to travel for his health, but he died on board ship, off the coast of New Zealand, on 30 December 1883.