Vintage NEVELIR H-3 Retro USSR Optics Lens For Sale
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Vintage NEVELIR H-3 Retro USSR Optics Lens:
$99.00
Vintage NEVELIR H-3 Retro USSR Optics LensLevel - a device, the device of which ensures the horizontal line of the sighting beam in the process of leveling. It is used to determine the geometric excess.Level H-3 is a blind level with a cylindrical contact level, the image of the ends of the bubble which is transmitted in the field of view of the pipe, and with an elevation screw. The telescope of the device has internal focusing. Mesh of threads. A box is mounted on the side of the pipe, in which a cylindrical level and a system of prisms move, transmitting the image of the ends of the level bubble in the field of view of the pipe. The prism system of the level makes an optical contact of the ends of the bubble of the cylindrical level, along which the bubble is set to a zero point. There is a circular level to set the axis of the device in a vertical position. Exact alignment of the images of the ends of the bubble of the cylindrical level is performed using the elevation screw. Adjustment of the cylindrical and circular levels is carried out using the appropriate adjusting screws. The cylinder level adjusting screws are located in a socket covered with a cover. To compensate for the length of the bubble of the cylindrical level due to temperature changes, a compensation stick made of milk glass is inserted into the level ampoule. To secure the position of the telescope, there is a fixing screw, for precise aiming, a guide screw is used. The stand has three lifting screws, which have grooves to support the spring plate. In the central part of the plate, there is a threaded bushing, into which a mounting screw is screwed, which holds the level with a tripod. There are adjusting nuts for adjusting the lifting screws.Please see all the photos. Ask a question before buying.
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