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Orion 9823 manual

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Table of contents for the manual

  • Page 1

    INSTRUCTION MANUAL IN 161 Rev . B 0109 Providing Exceptional 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 Orion ® Apex ™ Maksutov-Cassegrain Optical T ube Assemblies ™ #9820 Apex 90mm #9823 Apex 102mm #9825 Apex 127mm[...]

  • Page 2

    W elcome to a new w orld of adventure! Y our Ape x Maksutov-Casseg rain (Mak-Cass) telescope is a fine-quality instrument designed for both da ytime terrestrial viewing and nighttime stargazing. Compact, por table , and easy to use, this v ersatile scope will provide man y hours of enjo yment f or the whole f amily . These instructions will help yo[...]

  • Page 3

    3 Getting Started The Ape x telescopes come nearly fully assembled from the f actor y . The optics hav e been installed and collimated, so y ou should not hav e to make an y adjustments to them. Open the bo x and inspect the contents to make sure all of the parts list- ed abov e are present. Refer to Figure 1 to see what the par ts look like , and [...]

  • Page 4

    4 Camera tripods or altazimuth mounts are desireable f or ter- restrial (land) viewing because they allo w simple ver tical and horizontal mov ement of the telescope. An equatorial mount is desirab le for astronomical vie wing because it allows easy trac king of celestial objects as the Ear th rotates. Also , the set- ting circles on the mount enab[...]

  • Page 5

    5 and less shar p (this is a fundamental la w of optics). The steadiness of the air (the “seeing”) can also limit how much magnification an image can tolerate. Alwa ys star t viewing with your lo west-power (longest f ocal length) ey epiece in the telescope. It’ s best to begin obser ving with the lowest-po wer eyepiece , because it will typi[...]

  • Page 6

    6 No surf ace markings can be seen on V enus, which is alwa ys shrouded in dense clouds. MARS If atmospheric conditions are good, you ma y be able to see some subtle surf ace detail on the Red Planet, possibly e ven the polar ice cap . Mars makes a close approach to Earth e very two years; during those approaches its disk is larger and thus more f [...]

  • Page 7

    7 smudges ma y be removed using this method. Use caution; rubbing too hard may scr atch the lens. For the large surf ace of the meniscus lens, clean only a small area at a time , using a fresh lens tissue on each area. Nev er reuse tissues. Specifications #9820 Apex 90mm O T A Optical design: Maksutov-Cassegr ain Aper ture: 90mm Eff ective f ocal l[...]

  • Page 8

    8 Orion T elescopes & Binoculars Post Office Box 1815, Santa Cruz, CA 95061 Customer Support Help Line (800) 676-1343 • Day or Evening One-Y ear Limited W arranty The Ape x Maksutov-Cassagr ain Opitcal T ube Assemblies are w arranted against def ects in materials or workmanship for a period of one year from the date of purchase . This warrant[...]