Bushnell 78-9675 User Manual

675 x 4.5” Reflector Telescope

fig. 1

9 10

1. Finderscope

2. Finderscope Mount

3. Rack & Pinion Focusing Mechanism

4. Eyepiece

5. Fine Adjustment Cables (2)

6. Counterweight

7. Counterweight Shaft

8. Tripod Leg Middle Section

9. Accessory Tray Brace

10. Accessory Tray

11. Tripod Leg Lock Screws

12. Tripod Leg

13. Horizontal Axis Lock

14. Primary Mirror (Internal)

15. Telescope Main Tube

16. Finderscope Focus Adjustment

17. Finderscope Adjustment Screws (3)

18. Declination Lock Knob

19. Declination Scale

20. Equatorial Mount

21. Right Ascension Lock Knob

22. Latitude Lock Knob

23. Latitude Scale

24. Right Ascension Scale

25. Cradles

Model 78-9675

See pg. 2 (fig. 1)

STANDARD EQUIPMENT

• Reflector Telescope Assembly

• Equatorial Mount

• Variable Height- Heavy Duty Aluminum Tripod

• 4mm, 12mm, 20mm focal length - 1.25" Eyepieces.

• 5 x 24 mm Finderscope w/ focus adjustment

• 3x Barlow

• Accessory tray: 3-3/4” bolts, 6-1/2” washers, 3-wingnuts

TELESCOPE ASSEMBLY

fig. 1

1. Remove all components from the carton and identify all components. READ THROUGH ASSEMBLY

INSTRUCTION BEFORE YOU ASSEMBLE YOUR TELESCOPE.

2. Set-Up Tripod

• Select one tripod leg. Loosen Tripod Leg Lock Screw (11) and extend the Tripod Leg Middle Section (8).

Tighten the Tripod Leg lock Screw so that the Middle Section is securely in place. Repeat for the remaining two legs.

3. Attach Telescope and Finderscope

• Locate the pre-assembled Telescope Main Tube (15) and

Equatorial Mount (20). Note: Before assembling tripod legs to Equatorial Mount, make sure the Accessory Tray Braces (9) face

inward. Loosen long bolts at the top of Tripod Leg (12).

Carefully remove Telescope Main Tube from Cradles (25). Position the mount over the Tripod Leg as shown (fig. 2). and secure Equatorial Mount to Tripod Leg. Repeat on the remaining two Tripod Legs. Once you have attached all Tripod

Legs to the mount, securely tighten all wing nuts and place Telescope Main Tube back into Cradles.

Locate the Finderscope (1) with pre-assembled Finderscope Mount

(2). Remove the two nuts located near the front of the

telescope (closet to the eyepiece) and place the Finderscope and Finderscope Mount over the exposed screws. The

Finderscope Focus Adjustment (16) should point towards the Primary Mirror (14). Replace the nuts, and securely tighten

fig. 2

the Finderscope and Finderscope Mount in place.

1. Attach Accessory Tray

• Locate the Accessory Tray (10). Using the accessory tray bolts, wingnuts and washers connect the

Accessory Tray to the Accessory Tray Braces (9). Start with one tripod leg and attach wingnuts.

Wingnuts should be positioned beneath the accessory tray. Do not tighten wingnuts until all

Accessory Tray Braces are attached as some adjustments may be required.

2. Attach Control Cables, Counterweight and Eyepieces

• Locate the Fine Adjustment Cables (5). Loosen the silver screws located at the end of the Fine

Adjustment Cables and attach the Fine Adjustment Cables to the two silver posts found on the Equatorial Mount. The first post is located just above the Declination Lock Knob (18), the second post is located

below the Right Ascension Scale (24).

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 Voyager 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

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 (1) will be centered in the field of view of the main telescope.

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