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Meade EXT90, Instruction Manual, Page: 49 / 60

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Meade EXT90 Instruction Manual Download Page 49

SPECIFICATIONS

Model and Product Number 

ETX90 Portable Observatory  # 3514-04-20

Optical System 

Optical Design 

Maksutov-Cassegrain 

Primary Mirror Diameter 

3.5” (90mm) 

Primary Mirror Material 

Optical quality glass 

Focal Length, Focal Ratio 

1250mm, f/13.8 

Optical Coatings 

Ultra-High Transmission Coatings (UHTC™) 

Resolving Power (arcseconds) 

1.3 arcseconds 

Limiting Visual Stellar Magnitude 

11.7 

Viewfinder 

Red Dot

Mount 

Mount Type 

Dual Fork Altazimuth 

Power 

6 “AA” Cell Batteries or AC Adapter 

Battery Life 

20 hours 

Tripod 

Adjustable-Height Steel Leg Tripod  

 

with EQ tilt-plate

Electronics

 

Controller Hand Box 

AutoStar #497

Included Accessories

 

Eyepieces 

Super Plössl 26mm and 9.7mm - 1.25” 

Bubble Level/Compass 

Included - 1.25” 

Astronomy Software 

Included - for Windows OS

Weight

 

Telescope 

9.05 lbs. 

Tripod 

13.3 lbs 

Carry Case 

6.65 lbs

SPECIFICA

TIONS

9

Summary of Contents for EXT90

Page 1: ...Instruction Manual ETX90 Maksutov Cassegrain Telescopes with AutoStar 497 Hand Controller...

Page 2: ...taking care not to mix old and new ones or batteries of different types Clean the battery contacts and also those of the device prior to battery installation Ensure the batteries are installed correc...

Page 3: ...Meade Instruments Corp Patents US 7 277 223 US 7 079 317 US 7 092 156 US 6 304 376 US 6 369 942 US 6 392 799 2011 Meade Instruments Corp CONTENTS Introduction A solid telescope built for a lifetime of...

Page 4: ...Fork Mounts with standard equipment dual axis drive system and 497 AutoStar Controller The rigid fork mountings of the ETX Maksutov Cassegrain telescope include high torque DC motors on both telescop...

Page 5: ...the telescope outside into the dark for observing Just follow the simple steps below and you will be up and running before you know it 1 It is best to set up the telescope in twilight or before sunse...

Page 6: ...ttached to the holder Insert 6 user supplied AA batteries in the holder Refer to the diagram on the holder to orient the batteries properly Replace the holder back into the battery compartment and rep...

Page 7: ...you can Press 0 to begin Easy Alignment See page 11 for more information Attaching Accessories 8 Be sure the telescope master power switch is in the off position Remove the ETX90 handbox and the coil...

Page 8: ...idyouinpointingyourtelescope easily It works much like a fighter pilot s heads up display To turn on the Red Dot Finder carefully rotate the power switch until you feel it click on Turning further clo...

Page 9: ...would be minus 13 degrees West of True North or 347 360 17 347 and you would align your telescope tube along this line Using the AutoStar right arrow slew button to rotate the telescope clockwise unt...

Page 10: ...country state province and city or zip code are only asked for the first time you turn on the control panel If you wish to change this setting later on use the Site menu See SITE page 32 for more info...

Page 11: ...epiece field Press ENTER If that area of the sky is obscured by an object you can prompt AutoStar to chose an alternate star by pressing either one of the two Scroll Keys Repeat procedure for the seco...

Page 12: ...eed to use the Arrow keys to center Saturn precisely in the eyepiece AutoStar then automatically moves the telescope so that it tracks Saturn or whatever other object you may have chosen i e Saturn re...

Page 13: ...b 9 Horizontal Lock Computer Control Panel ON OFF Switch Auxiliary AUX Port Handbox HBX Port Battery Connector not shown accessible thru battery compartment door on top of base housing LED Base Housin...

Page 14: ...gure 9 ETX90 Control Panel Figure 8 ETX90 Red Dot Figure 7 ETX90 Bubble Level 2 2 Flip Mirror and Flip Mirror Control Knobs 2 Photo Port 2 Declination Dec Setting Circle on left fork arm 2 Viewfinder...

Page 15: ...kwise to focus on distant object Meade makes a complete line of accessories to enable you to get the most fun and performance from your ETX90 telescope No matter what you want to accomplish we have th...

Page 16: ...o place the flip mirror in the down position turn the control until it is horizontal 2 Photo Port Attach any 35mm camera with a removable lens to this port using an optional 64 T Adapter or attach the...

Page 17: ...Length 1250mm Eyepiece Focal Length 26mm 1250 26 48 1x The magnification is therefore 48 1x Low power eyepieces offer a wider field of view bright high contrast images and long eye relief To find an o...

Page 18: ...nd spectacular wide field views of the heavens They are made to the same high quality standards as the primary optics in your ETX90 telescope and allow you to get all the performance that the optical...

Page 19: ...The basic means of photography through any ETX Astro telescope the 64 T Adapter threads to the rear cell of the telescope followed by a T Mount appropriate to the user s brand of 35mm cam era In this...

Page 20: ...celestial objects to view on any given night of the year Download the latest satellite data and software revisions directly from the Meade website www meade com and share software with other AutoStar...

Page 21: ...ation Right Ascension and Declination astronomical coordinates Altitude vertical and Azimuth horizontal coordinates Date Site coordinates Local Time and Local Sidereal Time LST Timer and Alarm Status...

Page 22: ...tion manual If you have a question about an AutoStar operation e g INITIALIZATION ALIGNMENT etc hold down the key and follow the directions that scroll on the second line of the LCD screen When a word...

Page 23: ...y or ill defined reduce to a lower power eyepiece where the heat waves do not have such an effect on image quality Observing in early morning hours before the ground has built up internal heat produce...

Page 24: ...vels into AutoStar are traveled each press of the MODE key moves up a level until the top level Select Item is reached Once in the Select Item level press MODE to return to the topmost level Select It...

Page 25: ...keys to cycle through the list of stars in the constellation from brightest to dimmest Deep Sky is a database of objects outside our Solar System such as nebulae star clusters galaxies and quasars gr...

Page 26: ...AutoStar 497 MENU TREE Figure 14 The AutoStar 497 Menu Tree AutoStar 497 MENU TREE 26...

Page 27: ...rocedure Do not move the telescope manually or the alignment will be lost 1 When a desired object is visible in the eyepiece keep pressing MODE until the Select Item Object menu is displayed Press ENT...

Page 28: ...To use the Timer press ENTER then choose Set or Start Stop Set Enter the time to be counted down in hours minutes and seconds then press ENTER Start Stop Activates the timer set previously Use the Sc...

Page 29: ...aving is used to enable or disable Daylight Savings time Note Daylight Savings Time may be referred to by different names in various areas of the world Check local time to verify Telescope accesses th...

Page 30: ...erses the functions of the Left and Right Arrow keys i e the Right key moves the telescope to the left Reverse UP DOWN reverses the functions of the Up and Down Arrow keys i e the Up key moves the tel...

Page 31: ...are This is useful if one user has downloaded a new version ofAutoStar software from the Meade website www meade com and wants to pass this software along to friends All Everything user defined inform...

Page 32: ...formation is available on most maps 1 Using the Add option choose a site on the list that is closest to your observing site and press ENTER so that the site is added to your observing sites list Choos...

Page 33: ...roll Down key once User Object Add displays Press ENTER 5 Name displays on the top line and a blinking cursor on the second line Use the Arrow keys as previously described to enter the name of the obj...

Page 34: ...ress ENTER 4 Calculating and then Tracking displays If the satellite is going to make a pass Located displays 5 Use the Scroll keys to display data about the pass aos acquisition of signal and los los...

Page 35: ...are already in the AutoStar database If these commands follow the command AUTO SELECT the object s title displays on line 1 and its description scrolls across line 2 Do not add a description string a...

Page 36: ...lowed by the name of the desired constellation in quotes For example CONSTELLATION Leo Major NGC xxxx Enter NGC followed by the desired New General Catalog number and AutoStar provides the user with a...

Page 37: ...ible at this time PICK END AUTO SLEW ON AUTO SLEW OFF With AUTO SLEW ON enabled in the tour AutoStar automatically slews the telescope to objects first before displaying the text description This feat...

Page 38: ...The object is now stored in memory 9 Landmark Add displays If you wish to add more landmarks repeat steps 5 through 7 To Select a landmark from the database 1 Make sure the telescope is located and al...

Page 39: ...abase during the Alt Az alignment procedure AutoStar offers two methods described below Two Star Alt Az Alignment Two Star Alignment requires some knowledge of the night sky AutoStar provides a databa...

Page 40: ...Star then displays a database of stars for the observer to choose from Use the Scroll keys to scroll to a star on the list that you wish to align upon Select a star that you can easily locate in the n...

Page 41: ...North the telescope is pointed when setting the Home Position Pg 9 Fig 1 Because the other methods use two stars to align upon they are more precise than One Star Alignment Browse This menu allows yo...

Page 42: ...nding upon the observer s line of sight and the angle of the light may reveal what appear to be scratches dark or Your ETX model telescope is a precision optical instrument designed to yield a lifetim...

Page 43: ...e the sharpest image To cool down the optics set the bright spots or uneven coatings giving the appearance of poor quality optics These effects are only seen when a high intensity light is transmitted...

Page 44: ...a and you have a question concerning your ETX90 telescope call the Meade Instruments Customer Service Department at 800 626 3233 Customer Service hours are 7 00 AM to 5 00 PM Pacific Time Monday throu...

Page 45: ...t Item Setup Setup Align Setup Telescope 3 4 6 ENTER Press the scroll up key once Access the Setup menu Multiple presses Access the Telescope menu 5 ENTER 1 Telescope Telescope Model Telescope Train D...

Page 46: ...ely a machine made of glass and metal but something far more a window through which the beating heart of the universe might be observed Objects in Space Listed below are some of the many astronomical...

Page 47: ...turn had ears Saturn s rings are composed of billions of ice particles ranging in size from a speck of dust to the size of a house The major division in Saturn s rings called the Cassini Division is o...

Page 48: ...r arcseconds 1 3 arcseconds Limiting Visual Stellar Magnitude 11 7 Viewfinder Red Dot Mount Mount Type Dual Fork Altazimuth Power 6 AA Cell Batteries or AC Adapter Battery Life 20 hours Tripod Adjusta...

Page 49: ...er arcseconds 1 3 arcseconds Limiting Visual Stellar Magnitude 11 7 Viewfinder Red Dot Mount Mount Type Dual Fork Altazimuth Power 6 AA Cell Batteries or AC Adapter Battery Life 20 hours Tripod Adjust...

Page 50: ...estial sphere So just as an object s position on the Earth s surface can be located by its latitude and longitude celestial objects may also be located using Right Ascension and Declination For exampl...

Page 51: ...y doesn t slip while you are attaching the telescope 3 Turn the tripod so that the face of the tilt plate points North Figs 20 If you attach the telescope to the tripod indoors be sure to orient the f...

Page 52: ...AutoStar First choose Polar fromthe Setup Telescope Mount menu The rest of the procedure is almost identical to the Alt Az One Star Alt Az Alignment page 41 except that AutoStar prompts you to point...

Page 53: ...motor drive be turned on and that a low power eyepiece e g a 26mm eyepiece be employed Then use the following procedure 1 Identify the celestial coordinates R A and Dec of a bright easy to find objec...

Page 54: ...ity Oklahoma 35 N Ottawa Ontario 45 N Philadelphia Pennsylvania 40 N Phoenix Arizona 33 N Portland Oregon 46 N Salt Lake City Utah 41 N San Antonio Texas 29 N San Diego California 33 N San Francisco C...

Page 55: ...a factor of 6 3 The secondary mirror light baffle in combination with the anti reflection threads inside the primary mirror baffle produces extremely high contrast astronomical images at the focal pla...

Page 56: ...4 6 46 4 0 40 4 0 40 44 4 4 44 38 3 8 38 4 4 4 4 4 42 4 2 42 42 36 3 6 36 40 4 0 40 34 3 4 34 38 3 8 38 38 36 3 6 36 36 36 32 32 3232 34 3 4 34 34 30 30 3030 32 3 2 32 32 32 3 2 28 28 2828 1 4 14 14 1...

Page 57: ...MAGNETIC DECLINATION 57 MAGNETIC DECLINATION WORLD APPENDIX H...

Page 58: ...t or human health from uncontrolled waste disposal please separate this from other types of wastes and recycle it as required by law Household users should contact either the retailer where they purch...

Page 59: ...n Goods Authorization RGA number must be obtained from Meade by writing or calling 800 626 3233 Each returned part or product must include a written statement detailing the nature of the claimed defec...

Page 60: ...27 Hubble Irvine California 92618 800 626 3233 www meade com 10 06 11 55 09007 3514 04 15 3514 04 20...

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