ORION TELESCOPES & BINOCULARS 52588 Instruction Manual Download

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INSTRUCTION MANUAL

IN 590 10/17

Orion

BX90 90mm

Equatorial Refractor

#52588

Customer Support:

www.OrionTelescopes.com/contactus

Corporate Offices:

89 Hangar Way, Watsonville CA 95076 – USA

modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.

Providing Exceptional Consumer Optical Products Since 1975

Summary of Contents for 52588

Page 1: ...ffices 89 Hangar Way Watsonville CA 95076 USA Copyright 2017 Orion Telescopes Binoculars All Rights Reserved No part of this product instruction or any of its contents may be reproduced copied modifie...

Page 2: ...ant without a professionally made solar filter that completely covers the front of the instrument or permanent eye damage could result Young children should use this telescope only with adult supervis...

Page 3: ...3 Figure 1 Parts of the BX90 EQ refractor A H I J F G C D B L K M E...

Page 4: ...the shaft Figure 8A Then thread the knurled nut on the shaft onto the cable s threads until tight Figure 8B Now the mount is properly attached to the tripod and outfitted for use Next you ll attach t...

Page 5: ...ephone pole that s at least a quarter mile away Center the target in the eye piece by turning the slow motion cables as needed to point the telescope For larger telescope movement release the R A and...

Page 6: ...ted red dot The target object should appear in the field of view somewhere near the red dot NOTE This finder has two brightness settings When the switch is set all the way over to the ON position the...

Page 7: ...ry life Balancing the Telescope In order for the telescope to move smoothly on its mechanical axes it must first be balanced as follows 1 Keeping one hand on the telescope optical tube loosen the R A...

Page 8: ...of view while you re observing An equatorial mount has two perpendicular axes right ascen sion and declination Figure 7 The R A axis also known as the polar axis can be aligned to be parallel with th...

Page 9: ...by loosening the R A and Dec lock knobs Figure 7 and moving the telescope about the mount s R A and Dec axes Once the telescope is pointed somewhere close to the object to be viewed retighten the mou...

Page 10: ...he equatorial mount so the telescope optical tube can move freely 3 Point the telescope at the bright star whose coordinates you know Lock the R A and Dec lock knobs Center the star in the telescope s...

Page 11: ...poor and you will be limited to viewing at lower magnifications At higher magnifications images will not focus clearly Fine details on the planets and Moon will likely not be visible In conditions of...

Page 12: ...observe the Moon when it is well above the horizon to get the sharpest images Use an optional Moon filter to dim the Moon when it is very bright It simply threads onto the bottom of the eyepieces you...

Page 13: ...d be kept in a protective box or storage case Keep the dust cover on the front of the telescope when it is not in use Your refractor telescope requires very little mechanical mainte nance The optical...

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Page 16: ...instrument has been abused mishandled or modified nor does it apply to normal wear and tear This warranty gives you specific legal rights It is not intended to remove or restrict your other legal righ...