Bushnell 78-9675 业主指南

1.  Arrange the telescope so that the telescope body is horizontal to the floor (latitude of 0

°

). Loosen the

. The telescope should now turn freely about the polar axis. Rotate the telescope

about the polar axis so that the 

 is parallel to the ground (horizontal).

 

2.  Loosen the 

 (located on the counterweight), and slide the 

 along

the shaft until the telescope remains stationary without drifting rotationally about the polar axis. Tighten
the 

Counterweight Lock Screw,

 locking the 

 into position.

 

3.  Now balance the telescope about the  Declination Axis. Loosen the 

 and the

 

(fig. 3) 

so that the telescope can slide freely inside the 

. Slide the telescope

up or down inside the rings until the telescope remains stationary without drifting rotationally about the
Declination Axis

.

 Tighten 

. The telescope is now balanced.

The 

 is designed to move in any direction. It can be set to allow

manual controls to track the movements of celestial bodies across the sky. This is
referred to as diurnal movement; movement of celestial  bodies  in  the  direction
opposite to that of the earth’s rotation and is around the earth’s axis.

By  aligning  the  telescope’s  polar  axis  at  celestial  North,  you  will  place  the
telescope in parallel with the earth’s axis and thus be able to locate stars in the sky
based on star atlas information. To compensate for your position on earth, the
polar axis is set in one of three ways:

•

  Set up the telescope at night. Loosen the 

 and rotate

the telescope around the declination axis until the arrow on the declination
scale points to 90 degrees. Tighten the 

. The telescope is

now roughly in parallel with the polar axis.

 

•

  Loosen the 

  and  turn  the  telescope  until  the

objective end faces due north. This can be done by approximating the location of the pole star (Polaris or
North Star) or by the use of a compass. True North is then found by directing the telescope at Polaris, as
magnetic North is slightly away from true North.

 

•

  Look up the latitude of your area in any geographical atlas. Loosen the 

 and set

the latitude scale to the correct latitude for your area. Aim the 

 at Polaris. You will probably

notice that Polaris is not dead center in the 

 field of view. This is probably because your

telescope is not absolutely level with the ground. Loosen the 

again and

turn the telescope so that it is directly aimed at Polaris. Tighten both the 

and

. Polaris is 1 degree from the North celestial pole. Therefore, the sighting of stars will

have to be slightly adjusted as you locate them in the heavens.

Fig. 3

Cradle Lock Knob

Cradle (25)