![]() ![]() The eyepieces’ rotation ability is approximately equal to three-quarters of a turn (270°). This binocular possesses eyepieces of the so-called "3/3" design (see Hans T.Seeger. Zeiss-Feldstecher, Handfernglaser von 1894-1919, Modelle-Merkmale-Mythos, pp.113-114) with the base diameter equal to 18 mm and the top prism cover width equal to 40 mm. This model’s objective diameter is equal to 20 mm (the earlier model had an aperture equal to 18 mm) and 8x magnification. The upper hinge disk is flat, without inscriptions (the binoculars’ magnification was indicated on it in earlier models and the interpupillary distances scale was indicated on it in later models). ![]() The “earlier” models, 4-x and 6-x have the same fixture design. The civilian application of this model is also proved by the central hinge fixture’s (clamp’s) small diameter (see photo), which has a hole for a knob (included to binoculars delivery kit), with the help of which the hinge could have been finally fixed depending on the observer’s interpupillary distance. Flat prism covers made of brass (the earlier models were made of aluminum) and a central hinge, which is attached to binoculars halves with the help of screws belong to distinctive features of this model. ![]() 60,000 of such devices were released from 1894 to 1908. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |