ASTRONZ DOBSONIAN GS680 Owner'S Manual Download

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Locate the two Altitude bearings and install onto the sides of the

optical tube using the screws already fitted in the slots on each side

of the optical tube and hex wrench provided.

The graduated scale allows you to make adjustments to balance

the optical tube (particuarly if you use any heavy accessories). Nor-

mally these should be in the centre, taking care that the bearings on

each side should be adjusted the same.

The “U-Shaped” blocks on the bearings are designed to fit perfectly

into the “U-shaped” cutouts on the dosonian base. The knobs on

the altitude bearings can be used to adjust how easy it is to move

the telescope in the altitude (up/down) direction

Telescope Assembly

Summary of Contents for DOBSONIAN GS680

Page 1: ...OWNER S MANUAL DOBSONIAN TELESCOPE ASTRONZ GS680 200mm 8 F 6 ASTRONZ GS880 254mm 10 F 5 ASTRONZ GS980 303mm 12 F 5...

Page 2: ...mer we can keep our prices down and give you the best value on the New Zealand market As passionate astronomers ourselves we understand how important it is to have the highest quality precision optics...

Page 3: ...ents Introduction 4 Specification 5 Parts 6 Assembly 7 Using your Telescope 10 Focuser 10 Eyepieces 10 Finderscope 11 Observation Tips 12 Selecting a SIte 12 Cooling 12 Seeing 12 Storage 13 Maintainen...

Page 4: ...eur astronomers for a reasonable cost In a Newtonian reflector telescope invented by British scientist Sir Issac Newton 1642 1727 light enters the telescope throught the top of the telescope the open...

Page 5: ...Telescope 1 35m Magnification 9mm EP 139x 30mm EP 42x GS980 Focal Length 1500mm Focal Ratio f 5 Aperture 303mm Weight Telescope 22kg Base 14kg Length Telescope 1 45m Magnification 9mm EP 167x 30mm EP...

Page 6: ...Base Sides 2 F Handle and screws B Base Front G Feet and screws 3 C Upper Base Plates H Long Screws 10 D Lower Base Plate I Eyepiece Tray and screws E Bearing Plates 3 J Adjustment Bolt wih large and...

Page 7: ...late over onto its feet and insert the metal bushing sleeve from the Adjustment Bolt into the centre hole Step 6 Place the Bearing Plates E onto the bushing ensurung they are kept in the correct order...

Page 8: ...alance the optical tube particuarly if you use any heavy accessories Nor mally these should be in the centre taking care that the bearings on each side should be adjusted the same The U Shaped blocks...

Page 9: ...e on the optical tube and install the find erscope bracket tighten ing the screw to hold it in place Loosen the two plastic adjusting screws on the finder scope base and slide the finder scope eye pie...

Page 10: ...focus knobs C D will not move the focuser In operation the sliver focus knob C will allow you to roughly focus the eypiece whilst the black knob D moves more slowly and will allow fine focus approxim...

Page 11: ...the centre of the field of view such as the top of the pylon in the image to the right Next use the finder and see if the same object is in the centre of the field of view In the case of the finder sc...

Page 12: ...view for at least 30 60 min utes to allow all components to come to equilibrium Using the supplied battery holder to power the fan on the base of the mirror can help cool the mirror faster If the ima...

Page 13: ...an Telescope is a precision scientific instrument great care should be taken in order to maintain the optics and alignment Cleaning of any part of the telescope should be undertaken a little as possib...

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