hensoldt wetzlar binoculars serial numbers

Nevertheless these are rugged instruments and their sturdy dustproof covers protect them well when not in use. They were also quite expensive, especially early in their production. This latter problem was solved later on by making the cover longer. Other problems remained though, such as having to turn the fine focus all the way down to store the instrument and turn it quite a long ways in the other direction to actually allow focusing after removing its cover. This accessory, when attached to the bottom of the microscopes, allowed the user to easily change the configuration of the microscope (both the Tami and the Protami), to allow inclination. This problem was solved by an accessory available no later than 1932. One of the drawbacks was that they were all vertical microscopes which did not incline, which made them uncomfortable to use for any prolonged period of time. As originally designed, these were of high quality but had several drawbacks, common to all three models. The introduction of the Tami was followed by the larger Metami (from about 1923 to 1928), and the more sophisticated Protami (from about 1925 to 1939). This was apparently powered by household current, and therefore the utility of this lighting system would be lost in field use. An attachable electric light source usable for both top lighting and reflected lighting is shown in the U.S.

The Tami, was patented in Germany in 1921 and in the United States in 1922. McArthur's microscope, although invented in the 1930's was not produced in large numbers until after WWII. As the craze for good quality 'pocket' instruments developed, the Hensoldt line competed with instruments by such makers as Goerz and Leitz in Germany and by the 1930's, foreign makers such as Baker, Bausch & Lomb, and Spencer. The Tami, smallest of the three was the first by Hensoldt marketed as a 'pocket microscope.' The Tami was patented in the U.S.A. These microscopes by Hensoldt of Wetzlar, Germany are rugged and highly portable instruments. Although this idea persisted more or less through the years that followed, a period of greater interest in pocket instruments, particularly modern achromatic ones, started with the introduction of the Hensoldt Tami in the 1920's. INTRODUCTION: The concept of a 'pocket microscope' dates back to the 18th century.

Hensoldt wetzlar binoculars serial numbers