Pentax AL-M Series User Manual

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5.3 Reticle ( just calibrating the horizontal line )
1）The distance between A and B is 30-50m,set the level at a point halfway
between A and B, Take the reading at a1 and b1 ( Fig.5.5 ).
2）Set the level at a point which 2m away from point A, taking the reading at a2
and b2 ( Fig 5.6 ).
Then the height of collimation at point B in telescope is like follows:

Pentax AL-M Series Specifications

General

Brand	Pentax
Model	AL-M Series
Category	Laser Level
Language	English