Celestron OMNI XLT 102 Bedienerhandbuch

OOmmnnii XXLLTT SSeerriieess TTeelleessccooppeess IINNSSTTRRUUCCTTIIOONN MMAANNUUAALL ●● OOmmnnii XXLLTT 110022 ●● OOm

AAttttaacchhiinngg tthhee CCeenntteerr LLeegg BBrraaccee Exhibit 2-6 1. Remove the access

5. The DEC slow motion knob attaches in the same manner as the R.A. knob. The shaft that the DEC slow motion ount, just below the telescope mountin

IInnssttaalllliinngg tthhee FFiinnddeerrssccooppeeelescope tube (on refractors and Schmidt-Cassegrain) and nt of the telescope tube (Newtonian), t

IInnssttalllliinngg tthhee SSttaarr DDiiaaggoonnaall he st fractors and Schmidt-asseg nare pho attach t Schmidt-assegrain:1. rn tinto (i. o 2.

The refracting telescopes can use eyepieces and diagonals of a 2” barrel diameter. To use a 2” barrel eyepiece, the 1 ” eyepiece adapter must first

BBaallaanncciinngg tthhee MMoouunntt iinn DDEECC. amp and rotate the telescope so that it is on one side of the mount (i.e., as described in the

AAddjjuussttiinngg tthhee MMoouunntt iinn AAllttiittuuddee • To increase the latitude of the polar axis, tighten the rear latitude adjustme

A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is focused. ome tele op

19 Figure 3-3 AA ccuuttaawwaayy vviieeww ooff tthhee lliigghhtt ppaatthh ooff tthhee SScchhmmiiddtt--CCaasssseeggrraaiinn ooppttiiccaall

2 TTaabbllee ooff CCoonntteennttss INTRODUCTION ...

20 IImmaaggee OOrriieennttaattiioonn he image orientation changes depending on how the eyepiece is inserted into the telescope. When using the

21 AAlliiggnniinngg tthhee FFiinnddeerrssccooppee ccurate alignment of the finder makes it easy to find objects with the telescope, especially

DDeetteerrmmiinniinngg FFiieelldd ooff VViieewwTo e = ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ s section, we can determine the field of view using the same 25mm eyepiece th

Up to this point, this manual covered the assembly and basic operation of your telescope. However, to understand your telescope more thoroughl

24aily motion of the Sun across the sky is familiar to even the m st casual observer. This daily trek is not the Sun oving as early astronomers tho

25LLaattiittuuddee SSccaalleehe easiest way to polar align a telescope is with a latitude scale. Unlike other methods that require you to find the

26igning, do NOT move the telescope in R.A. or DEC. You do not want to move the ar axis. The telescope is used simply to see where the polar axis

27DDeecclliinnaattiioonn DDrriifftt MMeetthhoodd ooff PPoollaarr AAlliiggnnmmeenntt the telescope. The declination drift method requires sta

28AAlliiggnniinngg tthhee RR..AA.. SSeettttiinngg CCiirrcclleeaps (#93722) or consulting a current astronomy magazine. nd easy to look up.

298. ipping in R.A. The telescope will track in R.A. as 9. d the object should be there. For some of the fainter objects, you may not be Wyou

Using the Lens Cap Aperture Stop with Refractor Telescopes ... 32 ASTROPHOTOGRAPHY...

30 With your telescope set up, you are ready to use it for observing. This section covers visual observing hints for both lar system and deep s

31 OObbsseerrvviinngg tthhee SSuunn Although overlooked by many amateur astronomers, solar observation is both rewarding and fun. However, beca

SSeeeeiinngg ity of the atmosphere and directly affects the amount of fine detail seen in extended s vary from time-to-time and place-to-place. The

After looking at the night sky for a while you may want to try photographing it. Several forms of photography are possible with your telescope, i

34 4. e infinity setting. 5. he telescope so that it points in that 6. 7. 8. . Set the shutter speed to the “B” setting and focus the lens to t

35• Any 100 to 400 ISO color slide film . Focus the telescope by turning the focus knob until the image is sharp. 4. 5. . Advance the film and

36desired target in the viewfinder of your camera. s possible. 5. Wait for the vibration caused by releasing the shutter to diminish. Also, wait f

37ith an illuminated reticle to monitor your guide star. For this purpose, Celestron offers the Micro Guide Eyepiece using and shutter data. po

CCDCCD IImmaaggiinngg ffoorr DDeeeepp SSkkyy OObbjjeeccttss pecial cameras have been developed for taking images of deep sky images. These

Whil s at its be CCaae your telescope requires little maintenance, there are a few things to remember that will ensure your telescope performst. E

Congratulations on your purchase of an Omni XLT Series telescope. The Omni XLT Series of telescopes come in several different models --- 102mm r

Figure 7-2 similar to the diffraction Pick a bright star and center it in the field of the telescope. Study the image of the star while racking it

Before you begin the collimation process, be sure that your telescope is in thermal equilibrium with the surroundings. Allow 45 minutes for the tele

42 CC The ng) the ce. Poo rror is th e three rews, placed 120 degrees apart, at the end of the telescope tube.

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Night Time Star Collimating After successfully completing daytime collimation, night time star collimation can be done by closely adjusting the pri

Figure 7-8 A collimated telescope should appear as a symmetrical ring pattern similar to the diffraction disk seen here. Take note of the

You will find that additional accessories for your Omni telescope will enhance your viewing pleasure and expand the usefulness of your telescope. F

Diagonal 2" Mirror (# 93519) - Celestron offers a 2" 90° Mirror Diagonal to slides into the barrel of a 2" refractor focuser. This dia

48e mount and therefore, its own T-Ring. Celestron has 8 different models for 35mm cameras. which ce ts y y SkyScout ( # 93970) – A hand held per

AAppppeennddiixx AA TTeecchhnniiccaall SSppeecciiffiiccaattiioonnss Omni XLT Series 21088 21090 31057 11084 Omni XLT 102

Figure 1-1 Omni XLT 102 Refractor 1 2 3 4 5 6 7 8 9 10 11 12 (Om

AAppppeennddiixx BB -- GGlloossssaarryy ooff TTeerrmmss A- Abs The apparent mag at a star wou it were obser a standard di 10 parsecs, or 32.6

Focal length The distance between a lens (or mirror) abrought to focus. The focal length dividend the point at which the image of an object at inf

Resolution The minimum detectable angle an optical system can detect. Because of diffraction, there is a limit to the minimum angle, resolution. T

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CCeelleessttrroonn TTwwoo YYeeaarr WWaarrrraannttyy A. Celestron warrants this telescope to be free from defects in materials and workmanship f

1 2 4 5 6 7 8 9 10 11 12 3 Figure 1-2 Omni XLT 150 Newtonian

Celestron 283TorrTel.Fax 310) 212-5835 CopyAll rights reserved. (Products or instructions may change withtem # 21088-

1 2 3 4 6 7 8 9 10 11 12 5 Figure 1-3 Omni XLT 127

This section covers the assembly instructions for your Celestron Omni XLT telescope. The equatorial mount is exactly the same for all the Omni tel