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Hertel & Reuss microscope. Hertel & Reuss was a manufacturer of optical instruments based in Kassel, Germany, which emerged around 1995 following the bankruptcy of its predecessor company (founded in 1927 by Otto Hertel and Eduard Reuss.)
Asahiflex I with viewfinder closed. Cameras using the M37 lens mount. Ashiflex I (1952–1953); Asahiflex Ia (1953–1954) — also sold as the Tower 23; Asahiflex IIb (1954–1957) — also sold as the Tower 23
Binoculars with high magnification and heavy weight usually require some sort of mount to stabilize the image. A magnification of 10x is generally considered the practical limit for observation with handheld binoculars. Binoculars more powerful than 15×70 require support of some type.
This is a list of notable antiques experts This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources .
Tasco imports binoculars with magnifications ranging between seven and ten power. They also offer Snapshot series binoculars, which include an ability to record video and capture still pictures as seen through the binoculars. Users can transfer images to a computer via a USB cable. Tasco provides software for viewing and printing photographs ...
Only about 35 of the viewers are manufactured each year, but several thousand are maintained by the company. Tower Optical has various arrangements with owners of the sites where the devices are located. Where the viewers are free, they are leased; at other locations, revenue is shared between the company and the site owner.
Charts for vision - •Distant vision: to determine visual acuity of distant vision ••Snellen's distant vision chart-do-; for those who can read in English ••Regional language charts-do-; for those who can read in their local language ••E Chart-do-; for those who can not read ••Landolt's broken ring chart-do-; for those who can ...
In addition to the more stereotypical binocular type, folding opera glasses were another common design. They were made mostly of metal and glass, with a leatherette cover for grip and color. Although folding glasses have existed in one form or another since the 1890s, [ 2 ] they were perhaps most popular in the mid-20th century and many from ...
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