ORION TELESCOPES & BINOCULARS Observer 70mm EQ 9802 Instruction Manual Download

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Tube rings

Tube ring clamps

Finder scope

Finder scope bracket

Finder scope alignment

screws (3)

Focuser drawtube

Eyepiece

Star diagonal

Focus knob

Declination slow-motion control

Declination lock knob

Latitude lock knob (hidden)

Latitude scale

Right ascension setting circle

Right ascension

slow-motion control

Tripod leg

Leg lock thumbscrew

Objective lens

Dew shield

Tube ring mounting bolt

Declination setting circle

Right ascension lock knob (hidden)

Counterweight shaft

Counterweight

Counterweight lock knob

Retaining washer and screw

Azimuth lock knob (hidden)

Tripod leg attachment bolt

Accessary tray bracket

Accessory tray

Figure 1. Observer 70 EQ Parts Diagram

Summary of Contents for Observer 70mm EQ 9802

Page 1: ...l Consumer Optical Products Since 1975 Customer Support 800 676 1343 E mail support telescope com Corporate Offices 831 763 7000 P O Box 1815 Santa Cruz CA 95061 INSTRUCTION MANUAL Orion Observer 70mm EQ 9802 Equatorial Refracting Telescope ...

Page 2: ...ude scale Right ascension setting circle Right ascension slow motion control Tripod leg Leg lock thumbscrew Objective lens Dew shield Tube ring mounting bolt Declination setting circle Right ascension lock knob hidden Counterweight shaft Counterweight Counterweight lock knob Retaining washer and screw Azimuth lock knob hidden Tripod leg attachment bolt Accessary tray bracket Accessory tray 2 Figur...

Page 3: ...oroughly before getting started Table of Contents 1 Parts List 3 2 Assembly 4 3 Balancing the Telescope 4 4 Aligning the Finder Scope 5 5 Setting Up and Using the Equatorial Mount 5 6 Using the Telescope Astronomical Viewing 6 7 Terrestrial Viewing 9 8 Care and Maintenance 9 9 Specifications 9 10 Suggested Accessories 9 1 Parts List Qty Description 1 Optical tube assembly 1 German type equatorial ...

Page 4: ...unt base of decli nation axis with the other hand When it is threaded all the way in position the counterweight about halfway up the shaft and tighten the counterweight lock knob 8 Remove the tube rings from the telescope tube Attach the ring to the equatorial head with the two hex head bolts provided Then lay the telescope tube in the open tube rings with the rings about midway along the tube s l...

Page 5: ...ignment by pointing the main telescope at anoth er object and centering it in the finder scope Then look through the main telescope eyepiece and see if the object is centered If it is your job is done If it isn t make the neces sary adjustments to the finder scope s alignment screws until the object is centered in both instruments The finder scope can be focused by rotating the knurled ring of its...

Page 6: ...ating the Right Ascension Setting Circle 1 Identify a bright star near the celestial equator and look up its coordinates in a star atlas 2 Loosen the R A and Dec lock knobs on the equatorial mount not the azimuth lock knob or latitude adjustment knob so the telescope optical tube can move freely 3 Point the telescope at the bright star near the celestial equator whose coordinates you know Center t...

Page 7: ... should be dismissed Keep in mind that at higher powers an image will always be dimmer and less sharp this is a fundamental law of optics The steadiness of the air the seeing will limit how much magnification an image can tolerate Always start viewing with your lowest power longest focal length eyepiece in the telescope After you ve located and looked at the object with it you can try switching to...

Page 8: ...tween the dark and light portions of the disk called the terminator A full Moon is too bright and devoid of surface shadows to yield a pleasing view The Planets The planets don t stay put like the stars they don t have fixed R A and Dec coordinates so you ll have to refer to charts published monthly in Astronomy Sky Telescope or other astronomy magazines to locate them Venus Mars Jupiter and Satur...

Page 9: ... off with a soft cloth and a household cleaner such as Windex or Formula 409 Cleaning the Optics A small amount of dust or a few specks on the glass objec tive main lens will not affect the performance of the telescope If dust builds up however simply blow it off with a blower bulb or lightly brush it off with a soft camel hair brush Avoid touching optical surfaces with your fingers as skin oil ma...

Page 10: ...inary line from the two Pointer Stars in the bowl of the Big Dipper Go about five times the distance between those stars and you ll reach Polaris which lies within 1 of the north celestial pole NCP Figure 2 Big Dipper in Ursa Major Little Dipper in Ursa Minor N C P Pointer Stars Polaris ...

Page 11: ...provided it is returned postage paid to Orion Warranty Repair 89 Hangar Way Watsonville CA 95076 If the product is not registered proof of purchase such as a copy of the original invoice is required This warranty does not apply if in Orion s judgment the instrument has been abused mishandled or modified nor does it apply to normal wear and tear This warranty gives you specific legal rights and you...

Page 12: ...Orion Telescopes Binoculars Post Office Box 1815 Santa Cruz CA 95061 Customer Support Help Line 800 676 1343 Day or Evening ...

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