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3.

  Locate  the 

Counterweight  (6)

  and 

Counterweight  Shaft  (7).

  Loosen  the  thumb  screw  located  on  the

Counterweight

 and slide the 

Counterweight

 onto the 

Counterweight Shaft,

 then and tighten thumb screw to

secure  the   

Counterweight

.  Thread  the 

Counterweight  Shaft

  into  the  hole  located  directly  below  the

Declination Lock Knob (18).

 Make sure that the shaft is securely  locked into mount.

 

4.

  Insert 

Eyepiece (4)

 into focusing tube to begin viewing.

 

Your Bushnell telescope is now ready to be used. To obtain the fullest enjoyment

 from your telescope, please refer to the additional information below.

HOW TO USE YOUR NEW TELESCOPE

Astronomical telescopes are designed in such a way that the image you will see appear

 will be UPSIDE DOWN and REVERSED, this is acceptable for viewing celestial bodies.

Selecting an Eyepiece:

1.  You should always start viewing with the lowest power eyepiece, which in this case is the 20 mm lens.

Note: the base power of each eyepiece is determined by the focal length of the telescope objective lens,

which for this model is 900 mm.  A formula can be used to determine the power of each eyepiece:

telescope OBJECTIVE lens focal length   EYEPIECE focal length = MAGNIFICATION

 (e.g. Using the

20 mm lens, the calculation would look like this:   900 mm 

÷

 20mm = 45x or 45 power.)

 

2.  Included with this telescope is a Barlow lens. Barlow lenses are used to double or triple the power of your

telescope. Place your Barlow between the focusing tube and the eyepiece. Using the example above,

your 3x Barlow lens would give you a total power of 135x or 135 power. (45 x 3 = 135x or 135 power)

Focusing Telescope:

1.

  After selecting the desired eyepiece, aim main telescope tube at a land-based target at least 200 yards

away (e.g. A telephone pole or building). Fully extend focusing tube by turning 

Rack and Pinion Focusing

Mechanism (3).

 

2.

  While looking through selected eyepiece (in this case the 20 mm), slowly retract focusing tube by turning

Rack and Pinion Focusing Mechanism

 until object comes into focus.

       

Aligning Finderscope:

1.

  Look through 

Main Telescope  Tube

 

(15)

  and  establish  a  well-defined  target.  (see  focusing  telescope

section)   Tighten all lock knobs (Declination, Latitude, Right Ascension, Horizontal Axis and Cradle)

 

so

that telescope’s aim is not disturbed.

 

2.

  Looking  through 

Finderscope  (1)

,  alternate  tightening  each

  Finderscope  Adjustment  Screw  (17)

  until

crosshairs of 

Finderscope

 are precisely centered on the same object already centered in 

Main Telescope

Tube's(15)

 field of view.

 

3.

  Now, objects located first with the 

Finderscope (20)

  will be centered in the field of view of  the  main

telescope

.

 

 

 

 

Balancing the Telescope

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