Pentax R-315(N) User Manual
69
10 CHECKS AND ADJUSTMENTS
10-4 Perpendicularity of Line of sight to horizontal axis
Checks
q
Position a target Point A at a distance 30m - 50m away from the instrument,
and sight it with the telescope.
and sight it with the telescope.
w
Loosen the telescope lock screw and turn the telescope until a point is sighted
at a distance roughly equal to that of Point A. This is Point B.
at a distance roughly equal to that of Point A. This is Point B.
e
With the telescope still reversed loosen the horizontal lock screw and rotate
the instrument around the vertical axis, and sight Point A again.
the instrument around the vertical axis, and sight Point A again.
r
Loosen the telescope lock screw and turn the telescope until a point is sighted
at a distance equal to that of Point B. This is Point C.
at a distance equal to that of Point B. This is Point C.
t
No adjustment is necessary if Point B and C are aligned.
Adjustments
q
If Points B and C are not aligned, mark Point D at 1/4 the length of the BC,
from Point C in the direction of Point B.
from Point C in the direction of Point B.
w
Using the adjustment pin, rotate the reticle adjustment screws horizontally
opposite each other (see preceding page), and move the reticle to sight Point
D.
opposite each other (see preceding page), and move the reticle to sight Point
D.
e
Repeat the check and make sure the adjustment is correct.
30 - 50m
30 - 50m
q
e
w
w
r
A
B
D
C
C
PENTAX R-300 (p65-88) 10/30/02 11:11 AM Page 69