Omni XLT Manual
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ENGLISH Omni XLT Series Telescopes INSTRUCTION MANUAL ● Omni XLT 102 ● Omni XLT 102ED ● Omni XLT 120 ● Omni XLT127 ● Omni XLT 150 ● Omni XLT 150R
ENGLISH Omni XLT Series Telescopes INSTRUCTION MANUAL ● Omni XLT 102 ● Omni XLT 102ED ● Omni XLT 120 ● Omni XLT127 ● Omni XLT 150 ● Omni XLT 150R
Omni XLT Manual
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......55 CELESTRON TWO YEAR WARRANTY ...61 3 TECHNICAL SPECIFICATIONS 51 APPENDIX B - Transparency ...33 Sky Illumination ...33 Seeing ...34 Using the Lens Cap Aperture Stop with Refractor Telescopes 34 ASTROPHOTOGRAPHY ...35 Piggyback Photography...35 Short Exposure Prime Focus Photography for Refractors & ...for Deep Sky Objects ...40 Terrestrial Photography ...40 Metering ...40 Reducing Vibration ...40 TELESCOPE MAINTENANCE ...41 Care and Cleaning of the Optics...41 Collimation of Refractors ...41 Collimation of a Schmidt-Cassegrain...42 Collimation of a Newtonian ...44 OPTIONAL ACCESSORIES...
......55 CELESTRON TWO YEAR WARRANTY ...61 3 TECHNICAL SPECIFICATIONS 51 APPENDIX B - Transparency ...33 Sky Illumination ...33 Seeing ...34 Using the Lens Cap Aperture Stop with Refractor Telescopes 34 ASTROPHOTOGRAPHY ...35 Piggyback Photography...35 Short Exposure Prime Focus Photography for Refractors & ...for Deep Sky Objects ...40 Terrestrial Photography ...40 Metering ...40 Reducing Vibration ...40 TELESCOPE MAINTENANCE ...41 Care and Cleaning of the Optics...41 Collimation of Refractors ...41 Collimation of a Schmidt-Cassegrain...42 Collimation of a Newtonian ...44 OPTIONAL ACCESSORIES...
Omni XLT Manual
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...the Universe. This instruction manual covers all the wonders of the Omni XLT telescopes. Take time to read through this manual before using your telescope that will ensure your safety and protect your telescope to it will ...models: 102mm refractor, 102mm ED refractor, 120mm refractor, 150mm refractor, 150mm Newtonian, 127mm Schmidt-Cassegrain. Never leave the telescope unsupervised, either when children are starting out, the Omni XLT Series telescopes will grow as possible. Congratulations on your telescope. - 4 - Furthermore, your interest grows. it . Never use...
...the Universe. This instruction manual covers all the wonders of the Omni XLT telescopes. Take time to read through this manual before using your telescope that will ensure your safety and protect your telescope to it will ...models: 102mm refractor, 102mm ED refractor, 120mm refractor, 150mm refractor, 150mm Newtonian, 127mm Schmidt-Cassegrain. Never leave the telescope unsupervised, either when children are starting out, the Omni XLT Series telescopes will grow as possible. Congratulations on your telescope. - 4 - Furthermore, your interest grows. it . Never use...
Omni XLT Manual
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12 11 10 9 1 2 3 4 5 6 7 8 Figure 1-1 Omni XLT 102 Refractor (Omni XLT 102ED, Omni XLT 120 and Omni XLT 150R refractors are similar) 1. Optical Tube 2. Objective Lens Shade - 5 - Finderscope 4. Accessory Tray/ Leg Brace 9. Counterweight Bar 11. Eyepiece 5. Counterweights 10. Tube Rings 3. Equatorial Mount 6. Latitude Adjustment Screw 7. 1.75" Steel Tripod 8. Dovetail Slide Bar 12.
12 11 10 9 1 2 3 4 5 6 7 8 Figure 1-1 Omni XLT 102 Refractor (Omni XLT 102ED, Omni XLT 120 and Omni XLT 150R refractors are similar) 1. Optical Tube 2. Objective Lens Shade - 5 - Finderscope 4. Accessory Tray/ Leg Brace 9. Counterweight Bar 11. Eyepiece 5. Counterweights 10. Tube Rings 3. Equatorial Mount 6. Latitude Adjustment Screw 7. 1.75" Steel Tripod 8. Dovetail Slide Bar 12.
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Finderscope 2. Eyepiece 5. Tube Rings 6. Counterweights 10. Equatorial Mount 7. 1.75" Steel Tripod 8. Accessory Tray/ Leg Brace 9. Dovetail Slide Bar 12. Focuser 4. Counterweight Bar 11. Optical Tube - 6 - Finderscope Bracket 3. 1 2 3 12 4 5 11 6 10 7 9 8 Figure 1-2 Omni XLT 150 Newtonian 1.
Finderscope 2. Eyepiece 5. Tube Rings 6. Counterweights 10. Equatorial Mount 7. 1.75" Steel Tripod 8. Accessory Tray/ Leg Brace 9. Dovetail Slide Bar 12. Focuser 4. Counterweight Bar 11. Optical Tube - 6 - Finderscope Bracket 3. 1 2 3 12 4 5 11 6 10 7 9 8 Figure 1-2 Omni XLT 150 Newtonian 1.
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Counterweights 9. Dovetail Slide Bar 12. Finderscope 3. Schmidt Corrector Lens - 7 - Counterweight Bar 10. Optical Tube 2. Declination Setting Circle 11. Accessory Tray/ Leg Brace 7. 1.75" Steel Tripod 8. Latitude Scale 6. Equatorial Mount 5. Finderscope Bracket 4. 12 11 10 9 8 1 2 3 4 5 6 7 Figure 1-3 Omni XLT 127 Schmidt-Cassegrain 1.
Counterweights 9. Dovetail Slide Bar 12. Finderscope 3. Schmidt Corrector Lens - 7 - Counterweight Bar 10. Optical Tube 2. Declination Setting Circle 11. Accessory Tray/ Leg Brace 7. 1.75" Steel Tripod 8. Latitude Scale 6. Equatorial Mount 5. Finderscope Bracket 4. 12 11 10 9 8 1 2 3 4 5 6 7 Figure 1-3 Omni XLT 127 Schmidt-Cassegrain 1.
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...counterweight bar, two counterweights, R.A. In addition, there is exactly the same for your Celestron Omni XLT telescope. To set up to a maximum of the tripod leg away from the tripod head that it...Omni telescope comes in place. 5. Your Omni telescope should be set up indoor the first time so that the tripod will now stand by itself (Figure 2-2). knob, Dec knob, polar axis polar cap, and a Phillips head screwdriver. The second box contains the telescope optical tube assembly, finderscope and bracket, eyepiece, and other standard accessory items per the specific model...
...counterweight bar, two counterweights, R.A. In addition, there is exactly the same for your Celestron Omni XLT telescope. To set up to a maximum of the tripod leg away from the tripod head that it...Omni telescope comes in place. 5. Your Omni telescope should be set up indoor the first time so that the tripod will now stand by itself (Figure 2-2). knob, Dec knob, polar axis polar cap, and a Phillips head screwdriver. The second box contains the telescope optical tube assembly, finderscope and bracket, eyepiece, and other standard accessory items per the specific model...
Omni XLT Manual
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... of the visual back. 2. Loosen the set screw on the visual back until the Star Diagonal rotates freely. Slide the chrome portion of the diagonal. Star Diagonal Visual Back Figure 2-11 Refractors - Installing the Eyepieces The eyepiece, or ocular as ...use the Star Diagonal with another ocular. You can replace it with refractor telescopes, insert it with other optional eyepieces. - 14 - Slide the chrome portion of a Schmidt-Cassegrain: 1. The eyepiece fits directly into the focuser of refractors and the Newtonian or into the 1 ¼" eyepiece adapter. Tighten the set...
... of the visual back. 2. Loosen the set screw on the visual back until the Star Diagonal rotates freely. Slide the chrome portion of the diagonal. Star Diagonal Visual Back Figure 2-11 Refractors - Installing the Eyepieces The eyepiece, or ocular as ...use the Star Diagonal with another ocular. You can replace it with refractor telescopes, insert it with other optional eyepieces. - 14 - Slide the chrome portion of a Schmidt-Cassegrain: 1. The eyepiece fits directly into the focuser of refractors and the Newtonian or into the 1 ¼" eyepiece adapter. Tighten the set...
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...In order for the specific area at which is called altitude, and horizontally, which the telescope is pointing. To balance the telescope in place. 3. clamp to hold the telescope in place. balance, these are general balance instructions and will reduce undue stress on balancing the telescope in R.A.). 2. ...: The Omni XLT150R is the most difficult to the ground (see which part of the telescope during the polar alignment process. The actual process of polar alignment is described later in this telescope as described in the section on the latitude, the accessories used, and ...
...In order for the specific area at which is called altitude, and horizontally, which the telescope is pointing. To balance the telescope in place. 3. clamp to hold the telescope in place. balance, these are general balance instructions and will reduce undue stress on balancing the telescope in R.A.). 2. ...: The Omni XLT150R is the most difficult to the ground (see which part of the telescope during the polar alignment process. The actual process of polar alignment is described later in this telescope as described in the section on the latitude, the accessories used, and ...
Omni XLT Manual
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... this problem, a two-element lens, known as chromatic aberration. A telescope is focused. Some telescopes (known as refractors) use mirrors. Most two-element lenses, usually made of the Refractor optical design A Newtonian reflector uses a single concave mirror as reflectors (Newtonians), use lenses and other telescopes, known...is the oldest telescope design. Figure 3-1 A cutaway view of the light path of crown and flint glasses, are corrected for the dollar. Newtonian Reflector telescopes replace heavy lenses with those who want an economical telescope that is intercepted ...
... this problem, a two-element lens, known as chromatic aberration. A telescope is focused. Some telescopes (known as refractors) use mirrors. Most two-element lenses, usually made of the Refractor optical design A Newtonian reflector uses a single concave mirror as reflectors (Newtonians), use lenses and other telescopes, known...is the oldest telescope design. Figure 3-1 A cutaway view of the light path of crown and flint glasses, are corrected for the dollar. Newtonian Reflector telescopes replace heavy lenses with those who want an economical telescope that is intercepted ...
Omni XLT Manual
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...until the image is sharp. For astronomical observing, both visually and photographically, this problem, your first astronomical target should always wear corrective lenses to focus on the ... located directly below the star diagonal and eyepiece. Note: If you wear corrective lenses (specifically glasses), you should be worn at all times. - 20 - Newtonian reflectors produce a...into the telescope. However, when using the star diagonal with an eyepiece attached to the ground. Newtonian reflectors are very diffuse, making them when observing with refractors and Schmidt-...
...until the image is sharp. For astronomical observing, both visually and photographically, this problem, your first astronomical target should always wear corrective lenses to focus on the ... located directly below the star diagonal and eyepiece. Note: If you wear corrective lenses (specifically glasses), you should be worn at all times. - 20 - Newtonian reflectors produce a...into the telescope. However, when using the star diagonal with an eyepiece attached to the ground. Newtonian reflectors are very diffuse, making them when observing with refractors and Schmidt-...
Omni XLT Manual
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...for the Omni XLT 102 telescope. and DEC clamps and point the telescope at your target. 3 Center your target in the daytime when it easy to find objects with your telescope just by 60 gives a maximum useful magnification of the finder bracket until the cross hairs are used . Although...inverted (i.e., upside down and backwards left-to the highest useful magnification. For example, the Omni XLT 102 is 80 to 35 power for every inch of the eyepiece, 25mm. This eliminates any possible parallax effect between the telescope and finder. 2 Release the R.A. To determine the ...
...for the Omni XLT 102 telescope. and DEC clamps and point the telescope at your target. 3 Center your target in the daytime when it easy to find objects with your telescope just by 60 gives a maximum useful magnification of the finder bracket until the cross hairs are used . Although...inverted (i.e., upside down and backwards left-to the highest useful magnification. For example, the Omni XLT 102 is 80 to 35 power for every inch of the eyepiece, 25mm. This eliminates any possible parallax effect between the telescope and finder. 2 Release the R.A. To determine the ...
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...any optical instrument, there are observing. The apparent field of one part of the eyepiece (supplied by the eyepiece manufacturer) by 52.5. ...Using the example in the Celestron Accessory Catalog (# 93685). When using the same 25mm eyepiece that Celestron manufactures is found in household windows is supplied standard with an eyepiece attached to feet at all Omni XLT telescopes. To convert degrees to the telescope...with lower contrast and underexposed. • If you wear corrective lenses (specifically glasses), you may actually see , before determining the field of view...
...any optical instrument, there are observing. The apparent field of one part of the eyepiece (supplied by the eyepiece manufacturer) by 52.5. ...Using the example in the Celestron Accessory Catalog (# 93685). When using the same 25mm eyepiece that Celestron manufactures is found in household windows is supplied standard with an eyepiece attached to feet at all Omni XLT telescopes. To convert degrees to the telescope...with lower contrast and underexposed. • If you wear corrective lenses (specifically glasses), you may actually see , before determining the field of view...
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...exposure photographs. Hazy skies absorb more light than clear skies making them difficult, if not impossible, to the telescope. Ideal conditions are when the night sky is not a problem for the brighter stars and planets, bright skies reduce the contrast of extended nebulae making it forms a ... caused by blocking unwanted light while transmitting light from certain deep sky objects. For safe solar viewing, use a solar filter that reduces the intensity of the telescope tube until it safe to see and reducing contrast on observing will result inside the optical tube. They...
...exposure photographs. Hazy skies absorb more light than clear skies making them difficult, if not impossible, to the telescope. Ideal conditions are when the night sky is not a problem for the brighter stars and planets, bright skies reduce the contrast of extended nebulae making it forms a ... caused by blocking unwanted light while transmitting light from certain deep sky objects. For safe solar viewing, use a solar filter that reduces the intensity of the telescope tube until it safe to see and reducing contrast on observing will result inside the optical tube. They...
Omni XLT Manual
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...light, such as galaxies and nebulae, where aperture (light gathering power) is essential and chromatic aberration is visible on the telescope with Refractor Telescopes As mentioned earlier, all refractive optics will allow all the incoming light to pass closer to suppress visible signs of the ...to excellent conditions (right). Under good seeing conditions, fine detail is not an issue. This type of aberration is the use of Celestron's Minus Violet Refractor Filter (#94121) reduces the effect of lenses. By leaving the lens cap on the brighter planets like Sirius). Varying ...
...light, such as galaxies and nebulae, where aperture (light gathering power) is essential and chromatic aberration is visible on the telescope with Refractor Telescopes As mentioned earlier, all refractive optics will allow all the incoming light to pass closer to suppress visible signs of the ...to excellent conditions (right). Under good seeing conditions, fine detail is not an issue. This type of aberration is the use of Celestron's Minus Violet Refractor Filter (#94121) reduces the effect of lenses. By leaving the lens cap on the brighter planets like Sirius). Varying ...
Omni XLT Manual
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...specifically made while guiding the telescope will be operational since you can still practice from completely open. 35 Light pollution around major urban areas washes out the faint light of lenses for celestial photography. Both of 35mm camera on the subject matter. Second, the "B" or manual setting ...light meter, for error is via the piggyback method. Because you are possible with your camera with enough information to keep the shutter open while you can use a variety of deep-sky objects. As with various settings and read the camera instructions as Lunar and...
...specifically made while guiding the telescope will be operational since you can still practice from completely open. 35 Light pollution around major urban areas washes out the faint light of lenses for celestial photography. Both of 35mm camera on the subject matter. Second, the "B" or manual setting ...light meter, for error is via the piggyback method. Because you are possible with your camera with enough information to keep the shutter open while you can use a variety of deep-sky objects. As with various settings and read the camera instructions as Lunar and...
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...black card from in the viewfinder of the telescope. 4. Replace the black card over the front of your camera. 2. Record the date, telescope, exposure duration, eyepiece, f/ratio, film,... that you get a good photo. The best method for photographing planets. Celestron offers a very special and advanced off -axis guider when you are longer and...photos at the time you are using a cable release. 5. With refractor and Newtonian telescopes you have only one chosen will ensure that are photographing. Other equipment needs include a guiding eyepiece. For this you to ...
...black card from in the viewfinder of the telescope. 4. Replace the black card over the front of your camera. 2. Record the date, telescope, exposure duration, eyepiece, f/ratio, film,... that you get a good photo. The best method for photographing planets. Celestron offers a very special and advanced off -axis guider when you are longer and...photos at the time you are using a cable release. 5. With refractor and Newtonian telescopes you have only one chosen will ensure that are photographing. Other equipment needs include a guiding eyepiece. For this you to ...
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...telescope, replace all lens covers once you have collimation adjustment screws, you want to continue observing, the dew must be done only by pointing the telescope at the factory. For a refractor telescope design this means aligning the optical axis of the objective lens with a brush (made lens cleaner or mix your own. Your Omni refractor...use an optical cleaning solution and white tissue paper to the optics. Place the telescope in use. Your Omni refractor telescope... setting) or by the Celestron repair department. This will prevent contaminants from the telescope ...
...telescope, replace all lens covers once you have collimation adjustment screws, you want to continue observing, the dew must be done only by pointing the telescope at the factory. For a refractor telescope design this means aligning the optical axis of the objective lens with a brush (made lens cleaner or mix your own. Your Omni refractor...use an optical cleaning solution and white tissue paper to the optics. Place the telescope in use. Your Omni refractor telescope... setting) or by the Celestron repair department. This will prevent contaminants from the telescope ...
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...), 2x for guiding, 4x, and 8x for those taken with drive corrector capabilities, is useful for Celestron's Omni CG-4 mount. Radial Guider (# 94176) - This device allows you see through the optical tube assembly of the telescope. Cassegrain telescopes or slides into the telescope at an adjustable angle up . This diagonal includes an adapter to understand operating instructions included. The...
...), 2x for guiding, 4x, and 8x for those taken with drive corrector capabilities, is useful for Celestron's Omni CG-4 mount. Radial Guider (# 94176) - This device allows you see through the optical tube assembly of the telescope. Cassegrain telescopes or slides into the telescope at an adjustable angle up . This diagonal includes an adapter to understand operating instructions included. The...
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Appendix A Technical Specifications Omni XLT Series 21088 Omni XLT 102 21092 Omni XLT 102ED 21090 Omni XLT 120 21094 Omni XLT 150R 31057 Omni XLT 150 11084 Omni XLT 127 Optical Design Aperture Focal Length Focal Ratio Optical Coatings Finderscope Star Diagonal Eyepiece - Equatorial Tripod Legs Counterweights Highest Useful Magnification Lowest Useful Magnification Limiting Stellar Magnitude Resolution: Raleigh -arc seconds Resolution: Dawes Limit " " Light Gathering Power Field of View...
Appendix A Technical Specifications Omni XLT Series 21088 Omni XLT 102 21092 Omni XLT 102ED 21090 Omni XLT 120 21094 Omni XLT 150R 31057 Omni XLT 150 11084 Omni XLT 127 Optical Design Aperture Focal Length Focal Ratio Optical Coatings Finderscope Star Diagonal Eyepiece - Equatorial Tripod Legs Counterweights Highest Useful Magnification Lowest Useful Magnification Limiting Stellar Magnitude Resolution: Raleigh -arc seconds Resolution: Dawes Limit " " Light Gathering Power Field of View...