Bushnell 78-9540 manual Answers To Commonly Asked Questions, Troubleshooting Guide

Models: 78-9540

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ANSWERS TO COMMONLY ASKED QUESTIONS

Venus--just like the moon, Venus changed phases from month to month. Some views of brilliant Venus appear as if you were looking at a distant crescent moon.

Nebulae--The Great Orion Nebula is a very well known night sky object. This and many others are brought to you by this telescope.

Star Clusters--View millions of stars densely packed in a cluster that resembles a ball.

Galaxies--One of the greatest and most interesting galaxies is our neighbor the Andromeda Galaxy. Enjoy this and many others. Much, much, more!

 

www.bushnell.com

 

 

 

ANSWERS TO COMMONLY ASKED QUESTIONS

 

 

 

 

 

 

 

1.

The image I see in the telescope is upside down and

An upside-down and reversed image

is a common

 

reversed from right to left ?

 

characteristic of most astronomical telescopes. Since

 

 

 

telescopes are used for astronomical viewing

 

 

 

orientation is not important.

The

image in the

 

 

 

finderscope will also be reversed.

 

 

 

 

 

 

2.

How do I determine the power my telescope ?

The power of your telescope can be

determine by

 

 

 

dividing the focal length of the objective lens by the

 

 

 

focal length of the eyepiece. The eyepiece focal length

 

 

 

is the number printed on the eyepiece. (For example:

 

 

 

1000 ÷ 25 = 40X)

 

 

 

 

 

3.

Where do I find the Telescope Focal Length

∙ The telescope focal length is the same focal length as

 

 

 

the objective focal length. For

this telescope it is

 

 

 

540mm. Telescope focal lengths range from 540mm

 

 

 

to 900mm on Bausch & Lomb and Bushnell

 

 

 

telescopes.

 

 

 

 

 

4.

What can I see with my telescope ?

∙ Telescopes with power ranging from 25X to 50X can

 

 

be used to view Star Clusters and Nebulae. 90X to 120X

 

 

telescope can view galaxies. Most planets can be seen at

 

 

any magnification.

 

 

 

 

 

 

 

5.

What do the numbers on the eyepiece mean ?

The numbers on the eyepiece

represents the “focal

 

 

 

Length” of the eyepiece.

 

 

 

 

 

 

 

 

TROUBLESHOOTING GUIDE

If after you have set-up your new telescope you are unable to see any objects, use this Quick

Reference guide to help you to understand the cause of the problem and quickly determine a remedy

1.I’ve completed the set-up yet I cannot see anything

Check to see if objective lens cover has been removed.

Try to view an object that is 200 or more yards away.

If there is more than one eyepiece included with the telescope, use the lowest power (highest number) eyepiece to begin viewing.

Use the Rack & Pinion Focusing Mechanism (3) to bring the object you are trying to view into focus

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Bushnell 78-9540 manual Answers To Commonly Asked Questions, Troubleshooting Guide