Bushnell 78-2010 User Manual

VOYAGER® 4.5 INCH FAMILY TELESCOPE

MODEL 78-2010

Never Look Directly At The Sun With Your Telescope

Permanent Damage To Your Eyes May Occur

Thank you for purchasing the Bushnell Voyager Family Telescope! Your new telescope has been
designed and crafted with the highest standards so that you may have years of enjoyment and
use out of this wonderful window to the heavens. This product comes complete with everything
you'll need to explore your universe. Whether you are just starting out in astronomy or you are
an avid astronomer we wish you, your family, and your friends all the best with this telescope.

Please utilize this manual to its fullest potential by reading it completely before you attempt to
use your new telescope. Once set-up, we've included a basic guide on how to get started in
astronomy at the end of this manual. While this is not a complete guide, it will give you some
initial pointers. As you advance in ability, we would highly recommend a supplemental star
atlas, beginning astronomy guide, moon map, or any other guide as you travel on your journey
through the universe.

READ THROUGH THESE INSTRUCTIONS

BEFORE YOU USE YOUR TELESCOPE

UNPACKING YOUR TELESCOPE

Included in your package you will find the main telescope body, the cradle base, a convenient
shoulder strap, and two eyepieces. Make sure that you've identified all the components before
trying to use your new telescope.

YOUR BUSHNELL® VOYAGER® FAMILY TELESCOPE COMES PREASSEMBLED FROM
OUR FACTORY. THE ONLY STEPS THAT YOU MUST TAKE TO USE YOUR TELESCOPE
FOLLOW.

PLACE TELESCOPE IN CRADLE BASE

1. Remove the Voyager Reflector Telescope Body (2) from carton.

2. Remove the Cradle Base (3) from the carton.

3. Place Telescope Body (2) into Cradle Base (3) making sure that the sphere-shaped end of the
telescope fits into the Cradle Base (3).

THE FINAL STEPS

1. Remove 1.25" Format Eyepiece (1) from carton.

2. Insert into Rack & Pinion Focusing Mechanism (4).

3. Remove Protective Dust Cover from end of telescope nearest the Rack & Pinion Focusing
Mechanism (4).

4. Let the adventure begin.

Your Bushnell Telescope is now ready to be used. To obtain the fullest enjoyment from your
telescope, please refer to the following additional information.

Astronomical Telescopes are designed in such a way that the image you see will appear UPSIDE
DOWN and REVERSED, this is acceptable for viewing celestial bodies.

SHOULDER STRAP ATTACHMENT (IF DESIRED)

1. Remove the Adjustable Shoulder Strap (8) (not shown) from the carton.

2. Attach one end of the Adjustable Shoulder Strap (8) to the Forward Clips (6) on the side of

the Telescope Body (2).

3. Attach the other end of the Adjustable Shoulder Strap (8) to either the other Forward Clip (6)
or the Rear Clip (7), whichever provides the most comfortable position. Adjust the Shoulder
Strap (8) and enjoy.

TELESCOPE USE

SELECTING AN EYEPIECE:

1. You should always start viewing with the lowest power eyepiece, which in this case is the 31
mm lens. Note: the base power of each eyepiece is determined by the focal length of the
telescope objective element, which for this model is 500 mm. A formula can be used to
determine the power of each eyepiece: telescope OBJECTIVE mirror focal length
EYEPIECE focal length = MAGNIFICATION (e.g. Using the 31 mm lens, the calculation

would look like this: 500 mm ÷ 31mm = 16x or 16 power.) In addition, the 5mm eyepiece

will provide a magnification of 100x or 100 power.

2. Offered as an accessory for this telescope is a Barlow lens (model #78-0105). Barlow lenses
are used to double or triple the power of your telescope by placing your Barlow between the
focusing tube and the eyepiece. Using the example above, a 2x Barlow lens would give you a
total power of 32x or 32 power. (16 x 2 = 32x or 32 power). The 2x Barlow Lens (model #78-

0105) would provide a 200x or 200 power magnification when used in conjunction with the
5mm eyepiece. Other accessories available include a 9mm eyepiece (model #78-0101) that
would give you 56x or 56 power and a standard camera adapter (model #78-0104) for
photographing the night sky.

FOCUSING TELESCOPE:

1. After inserting the eyepiece, aim the 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 &
Pinion Focusing Mechanism (4)

2. While looking through selected eyepiece (in this case the 31 mm), slowly retract focusing
tube by turning Rack & Pinion Focusing Mechanism (4) until object comes into focus.

COLLIMATING THE SECONDARY MIRROR

Good alignment or collimation of the telescope's optical components will guarantee the most
optimum viewing. This telescope body comes preassembled from the factory and
precollimated. Therefore collimation should not be required. However, due to its great
importance there are a few steps that you can take to ensure that your telescope is properly
collimated.

1. Remove the 1.25" Format Eyepiece (1) from the Rack and Pinion Focusing Mechanism (4).

2. Look into the Rack and Pinion Focusing Mechanism (4) with the eyepiece removed. You will

see the Secondary Mirror (5) located a few inches inside the end of the telescope tube nearest
the Rack and Pinion Focusing Mechanism (4). Since it is a mirror, you will see a reflection of
the large primary mirror. That mirror will show an image of the Secondary Mirror (5) and
your eye. Each image will be centered in a concentric set of images starting with the image of
the primary mirror, the Secondary Mirror (5), and your eye.

3. Please refer to the diagram to see what to expect.