Assembling Your Telescope
Aligning the Finderscope
Focusing
Using the optional Barlow Lens
Using the Tension Control Handle
Pointing the Dobsonian
Calculating the Magnification (power)
Calculating the Field of View
Calculating the Exit Pupil
Operating Your Telescope
Parts List
Base Assembly
Optical Tube Assembly
Proper Care for Your Telescope
3
6
3
4
5
Collimation
Cleaning Your Telescope
10
11
6
6
6
7
7
8
8
8
Sky Conditions
Selecting an Observing Site
Choosing the Best Time to Observe
Cooling the Telescope
Adopting Your Eyes
Observing the Sky
9
9
9
9
9
9
10
TABLE OF CONTENTS
B
efore you begin
C
aution!
This instruction manual is applicable to all the models listed on the cover. Read the entire
manual carefully before beginning. Your telescope should be assembled during daylight
hours. Choose a large, open area to work to allow room for all parts to be unpacked.
NEVER USE YOUR TELESCOPE TO LOOK DIRECTLY AT THE SUN. PERMANENT
EYE DAMAGE WILL RESULT. USE A PROPER SOLAR FILTER FOR VIEWING THE
SUN. WHEN OBSERVING THE SUN, PLACE A DUST CAP OVER YOUR
FINDERSCOPE TO PROTECT IT FROM EXPOSURE. NEVER USE AN
EYEPIECE-TYPE SOLAR FILTER AND NEVER USE YOUR TELESCOPE TO
PROJECT SUNLIGHT ONTO ANOTHER SURFACE, THE INTERNAL HEAT BUILD-UP
WILL DAMAGE THE TELESCOPE OPTICAL ELEMENTS.
