Eyepiece Adjustment - Pentax R-2501NS Instruction Manual

(A)
Levelling screw
[When using the Automatic inclination correction by 2 axes]
Please read procedure ⑥ because the horizontal angle and the perpendicular angle error by
a perpendicular axis are automatically corrected.
[When using the Automatic inclination correction by 1 axis]
The instrument is horizontally rotated by 180° after the bubble of the Electronic vial is
adjusted on the centre at a left circle position side and confirm that the bubble of the vial is
at the centre at the right circle position.
[When using without Automatic inclination correction]
Confirm the bubble is at the centre even if the instrument is rotated by any 90° .
⑥ Confirm whether the plummet is on the ground mark.When you confirm it is not on the
mark, loosen the centre screw and move the instrument over the ground mark correctly and
fix the instrument by a centre screw. Repeat from ① to ⑥

3.5 Eyepiece adjustment

[Eyepiece adjustment]
The eyepiece adjustment is performed before target
sighting.
① Remove the telescope lens cap.
② Point the telescope at a bright object, and rotate
the eyepiece ring full counter clockwise.
③ Look through the eyepiece, and rotate the
eyepiece ring clockwise until the reticle appears
at its maximum sharpness.
• When looking into the eyepiece, avoid an intense
look to prevent parallax and eye fatigue.
• When it is hard to see the reticle due to poor
brightness, press [ILLU] + [F3][RETICLE] to access the RETICLE INTENSITY ADJ.
screen. Use the left and right arrow to adjust the reticle intensity.
(B)
Levelling screw
Vertical line (single)
Horizontal line
Sight axis
Vertical lines (double)
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