Pentax R-322N - Manual (Page 25)

3 PREPARATION FOR SURVEYING
[Target sighting by Auto focus]
The Auto focus of R-300 series has following two modes.
1. Normal mode : Pressing AF button focuses on the target.
2. Continuous mode : Pressing AF buttons for two seconds beeps, and releasing
the key enters into the Continuous mode. This mode
enables you to perform the Auto focus approx. for one
minutes only by sighting the telescope and chasing the
target.
3 PREPARATION FOR SURVEYING
[Auto focus :Target sighting by Normal mode]
q Loosen the telescope clamp and horizontal clamp screws.
w Point the telescope at the target using a collimator.
e Tighten the above two screws.
r Adjust the eyepiece.
t Look through the telescope and press the AF button. Move your eye vertically
and horizontally to see if the target image moves in relation to reticle.
y Stay the reticle accurately on the target using telescope and horizontal
tangent screws.
If the target image does not move, there is no parallax. If it moves, eliminate
the parallax.
Even when vertical angle measurement is not performed, it is recommended
that the target should be placed at the reticle center.
Operating the Power focus key rotates the AF ring, so do not touch it while it
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