For precise levelling the GPM3 is fitted onto the NA2 or NAK2 telescope objective and locked in position with the knob. By turning the micrometer knob the parallel-sided glass plate is tilted, thereby causing the line of sight to be raised or lowered. The range of displacement is 10mm. On the scal..
The Leica NA2 meets all the requirements of precision levelling. As soon as it is set-up on a tripod and levelled with the bubble, the automatic compensator ensures that the line of sight is horizontal so that each staff reading is reliable.
Leica's top-class optical quality gives the NA 2 a bright..
Leica's top-class optical quality gives the NAK2 a bright, erect high contrast image. The NAK2 level has an internal glass circle for reading horizontal angles. Combined with the stadia calculation of distances from staff readings the NAK2 circle adds the application benefit of detail survey work.