Bushnell 78-9518 Manual De Usuario

1.  The image I see in the telescope is upside down and

reversed from right to left ?

•

 

An upside-down and reversed image  is  a  common

characteristic  of  all  refractor  telescopes.  Since

telescopes  are  used  for  astronomical  viewing

orientation is not important. An erecting lens can be

purchased separately  that  will  allow  you  to  see  a

“natural” image. The image in the finderscope will

also be upside down and 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

900mm. Telescope focal lengths range from 450mm

to 1000mm on Bausch & Lomb, Bushnell and Jason

telescopes.  Typical  focal  lengths  are  600mm,

700mm,  and  900  (Jason);  450,  750  and  910

(Bushnell); 900, 910 and 1000 for Bausch & Lomb.

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 150X and higher.

5.  What do the numbers on the eyepiece mean ?

•

 

The numbers on the  eyepiece  represents  the  “focal

Length” of the eyepiece.

 

 

 

 TROUBLESHOOTING GUIDE

 

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 

  to

bring the object you are trying to view into focus