SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
2 –
Preparation
31
Sighting
When the instrument is sighted, the telescope is aimed at the target, the target
image is focused upon and the image is then aligned with the center cross-hairs
of the telescope reticle.
Sighting the instrument:
1. Diopter adjustment:
a. Point the telescope at a blank area like a wall, the sky, or a sheet of
paper.
C
WARNING –
Never look at the sun through the telescope. If you do, you may damage or lose
your eyesight.
b. While sighting through the eyepiece, rotate the diopter
ring until the reticle crosshairs are brought into sharp, clear
focus.
2. Elimination of parallax:
a. Aim the telescope at the target.
b. Rotate the focusing ring until the target image is in sharp focus on the reticle crosshairs.
c. Move your eye vertically and laterally to check whether the target image moves relative to
the reticle crosshairs.
If the target image does not move, there is no parallax.
d. If the target image does move, rotate the telescope focusing ring. Then repeat from Step c.
3. Target alignment:
–
To align the target accurately on the center crosshairs, carefully rotate the tangent screw as
required.
Diopter ring
Telescope
focusing ring
