theodolite - N2 - 1951 - Switzerland - Wild Heerbrugg

The N2 from 1951 was for many years the backbone of the (geodetic) surveyor. With its reversible spirit level / telescope it made compensation of measurement errors possible. The instrument is relatively heavy and very sturdy. Accuracy Compared to the Wild NKII from 1926 there is little change. The telescope has grown to 193 millimeters to allow a small sunshade. The magnification is specified as "24 or 28 times". The image is still inverted and has two stadia hairs with a magnification constant of 100 along the vertical cross. The coincidence-f bottle has an accuracy of 30" per 2 millimeter run, which is less than the 20" of the Wild NKII from 1926. The leveling of the line of sight should be possible with an accuracy of about 0.5". 1 The leveling of a double kilometer should be possible with an accuracy of 2.0 millimeters. Based on appearance this N2 has had a fairly long working life. It came with the original case. on the case it states "Van Hopplynus" this was a very renowned optician and importer of precision instruments based in Koningsstraat in Brussels. Heavy signs of use but the lens is intact and everything still works. The photos are part of the description.

Estimación:€32

Ver todos los artículos deCatawikioNaútica, técnica & óptica