Meade LXD 75 instruction manual Method 2 Axis Alignment Procedures

Page 53

A

B

Fig. 44: A. Elevation Alignment; B. Attitude Alignment.

4.Autostar then chooses three stars from its database to align upon. When the telescope slews to a star for alignment, it may not appear in the field of view in the eyepiece. Use the Arrow keys to move the telescope until the star is visible and centered in the eyepiece. The alignment star should be easily recognized and be the brightest star in the area of the sky where the telescope is pointing. See WHICH ONE'S THE ALIGNMENT STAR, page 18, for more information. When the star is centered, press ENTER. Repeat the procedure for the second and third alignment stars.

Note: Autostar locates alignment stars based on the date, time, and location entered. The alignment stars may change from night to night. All that is required is for the observer to center the selected star in the

eyepiece when prompted.

Method 2: Axis Alignment Procedures

In order for the equatorial mount to accurately point to astronomical objects using the GO TO feature of the Autostar handbox, the optical axis of the optical tube must be aligned with the R.A. axis of the mount. In most cases, the telescope will perform ade- quately without making any adjustments, but performing one of the following align- ment methods before the initial use of the telescope, and periodically thereafter, will increase the mount’s pointing accuracy.

When the optical axis is perfectly aligned to the R.A. axis and the declination set to 90°, all objects will rotate about a point in the center of the eyepiece, as the mount is rotated about the R.A. axis. A misalignment in elevation results in the center of rotation shifting up or down. A misalignment in attitude results in the center shifting left or right.

The telescope is moved manually in Method #1 to correct for attitude misalignment and then for elevation misalignment. Autostar moves the telescope in Method #2.

Procedure #1: To correct for attitude misalignment

Important Note: Throughout the following procedures, the directional refer- ences up/down/left/right are used. No matter which type of telescope model you are using, these directions are to be interpreted relative to real-world tar- gets. For example, left/right moves the image along the horizon, and up/down moves the image vertically.

Perform this procedure during the daytime. You will need to have a clear line of sight to a wide, distinct landmark with a clear, horizontal feature.

1.Plug in Autostar and turn on the power as described previously in this manual. You will use Autostar's Arrow keys in the course of this procedure.

2.Loosen the R.A. Lock (33, Fig. 1d) and the Dec. Lock (17, Fig. 1d). Point the tube so that the tripod leg below the Fine Azimuth Control Knobs (27, Fig. 1c) approx- imately faces North (or South in the Southern Hemisphere). Retighten the Dec. Lock. Move the counterweight shaft and mount so that it is parallel to the horizon. This is position A. See Fig. 45. Retighten the R.A. Lock.

3.If using a Schmidt Newtonian model, rotate the optical tube (you will need to loosen the cradle ring lock knobs (13, Fig. 1a) to do so) to make sure the focuser extends horizontally from the optical tube while in position A and do not rotate the tube for the remainder of the alignment procedure.

If using a refractor model, use the diagonal assembly to rotate the eyepiece during testing. However, be careful that the diagonal is placed flush against the focuser and tightened in place using the thumbscrews. It is important that the diagonal does not slip during the procedure.

4.Adjust the tripod legs, polar axis altitude and/or polar axis azimuth so that the wide, horizontal object you have chosen as a target is positioned across the mid- dle of the eyepiece.

Procedure #1: Step 4

Step 5

Step 6

Step 7

53

Image 53
Contents LXD 75 -Series Telescopes Page Contents BC1 g f e Telescope FeaturesD E F LXD75-SeriesYour Personal Window to the Universe $ Computer Control Panel see e LXD75 Tips Tour the Cosmos with Just the Push of a Button Autostar FeaturesFeatures Tip Telescope Assembly How to Assemble Your TelescopeAccessories Getting StartedViewfinder assembly Newtonian reflector models Balancing the Telescope C D EChoosing an Eyepiece Aligning the ViewfinderObserving by Moving the Telescope Manually Too Much Power?Slew Speeds Autostar Models Only Activate the Arrow Keys Autostar Models OnlyObserve the Moon Setting the Polar Home PositionTracking Objects 16bTip Observe a Star using the Automatic Tracking FeatureInitializing Autostar Autostar Models Only Moving Through Autostar’s Menus Autostar Models OnlyTraining the Drive Autostar Models Only Go To Saturn Autostar Models Only Easy Alignment Autostar Models OnlyPlanet Saturn is over 800 million miles from the Earth Using the Guided Tour Autostar Models OnlyTo Calculate Sunset time Autostar Navigation ExerciseNavigating Autostar Entering Data into AutostarSelect Item Object Autostars MenusObject Menu MenusGlossary Menu Event MenuUtilities Menu LXD75-SeriesEnter Setup MenuObserving Considerations Setup Menu Daylight SAVING, Surf the Web To Edit a Site Adding Observing SitesTo Add a Site to the user-defined site list To GO to a user-entered object Using Autostar to Find Objects Not in the LibrariesTo Add a landmark to the database Observing SatellitesLandmarks To perform a Landmark Survey To Check on the Available MemoryTo Select a landmark from the database Photography with Meade’s Autostar Suite PhotographyFew tips on photography with the LXD75-Seriestelescopes 10 f/4 Optional AccessoriesSeries 4000 Photo-Visual Optional Autostar handbox for EC model users General Maintenance MaintenanceD e f g Page Defocused star images. Misaligned 1, 2, Aligned Page Page 4 Model SN-8AT, SN-8EC Specifications Specifications5 Model SN-6AT, SN-6EC Specifications 8 Model AR-6AT Specifications 10 f/4 Model SN-10AT Specifications9.3 Model AR-5AT, AR-5EC Specifications 5 Model N-6EC Specifications 10 Model SC-8AT SpecificationsAutostar Dimensions Autostar SpecificationsMeade Customer Service Inspecting the OpticsAppendix a Celestial Coordinates Setting CirclesPolar Alignment Locating the Celestial PoleOne-Star Polar Alignment Two-Star Polar AlignmentPolar Alignment Viewfinder Method #1 Three-Star Alignment Using AutostarEnhancement Methods To perform the Three-Star AlignmentProcedure #1 To correct for attitude misalignment Method 2 Axis Alignment ProceduresPosition a Procedure #2 To correct for elevation misalignmentTips Method 3 Axis Alignment Using AutostarPEC Update Menu Option Method #4 Smart Drive Training Periodic Error CorrectionPEC Train Menu Option PEC Erase Menu OptionAppendix C Latitude Chart Appendix D EC Handbox Slew Speeds To move the telescope using the Electronic ControllerModes of Operation Tracking Rates Optional Autostar Computer Controller for LXD75 EC Users Changing the Polar ModeMounting the SC bracket and optical tube to the mount How to Attach the Optical Tube to the MountAutostar Glossary Appendix F Basic AstronomyObjects in Space MoonDeep-Sky Objects PlanetsFurther Study Page Page Meade Limited Warranty
Related manuals
Manual 67 pages 4.12 Kb

LXD 75 specifications

The Meade LXD 75 is an advanced telescope mount designed for both amateur and professional astronomers looking to explore the wonders of the night sky. Known for its precision and ease of use, the LXD 75 offers several features and technologies that make it a standout choice for astrophotography and visual observation alike.

At the heart of the Meade LXD 75 is its robust equatorial mount, which provides stable tracking of celestial objects. This mount is both lightweight and durable, allowing for easy transport to observing sites. The equatorial design is especially beneficial for astrophotography, as it compensates for the Earth's rotation, enabling longer exposure times without the trailing effects commonly associated with less sophisticated mounts.

One of the most notable features of the LXD 75 is its dual-axis tracking system. This system allows users to electronically control the telescope's movements along both the right ascension and declination axes. The built-in Data Sky control panel is user-friendly, offering intuitive access to a wealth of astronomical data, including over 30,000 celestial objects. This makes locating and tracking objects in the sky simpler and more efficient.

The LXD 75 also supports a variety of telescope configurations, accommodating optical tubes up to 10 inches in diameter. This versatility makes it suitable for a range of viewing preferences, from planetary observations to deep-sky astrophotography. The mount's heavy-duty construction ensures it can handle the weight of larger telescopes while maintaining stability.

In terms of technology, the Meade LXD 75 is equipped with AutoStar computer technology. This innovative feature enables automatic location and tracking of celestial bodies using a simple pointing and clicking interface. Users can also create custom observing lists, making it easier to plan and execute dedicated viewing sessions.

Additionally, the LXD 75 boasts robust connectivity options, including the ability to integrate with a wide range of imaging software and accessories, making it a great choice for those interested in advanced astrophotography techniques. The mount's compatibility with Meade's own range of cameras and filters further enhances its potential for capturing stunning images of the universe.

In conclusion, the Meade LXD 75 is a well-rounded telescope mount that combines advanced technology with user-friendly features. Its equatorial design, dual-axis tracking, and AutoStar system make it an excellent choice for both novice and experienced astronomers. Whether for visual observation or astrophotography, the LXD 75 offers the performance and versatility to enhance any stargazing experience.