Celestron FirstScope 70EQ Instruction Manual Download Page 2 | Manualshive

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Summary of Contents for FirstScope 70EQ

Page 1: ...0 0 9 90 0 E EQ Q T TE EL LE ES SC CO OP PE E I I N N S S T T R R U U C C T T I I O O N N M M A A N N U U A A L L F Fi ir rs st ts sc co op pe e 7 70 0 E EQ Q 2 21 10 07 76 6 F Fi ir rs st ts sc co op pe e 9 90 0 E EQ Q 2 21 10 08 85 5 ...

Page 2: ...2 F F i i r r s s t t s s c c o o p p e e R R e e f f r r a a c c t t o o r r 70mm EQ shown 1 2 6 4 7 8 9 10 11 12 13 14 16 17 3 5 15 ...

Page 3: ...tific instrument With it you will enjoy numerous objects in the sky planets nebulae star clusters galaxies and other astronomical objects This manual covers both the 70mm equatorial model and the 90mm model The equatorial mount contains setting circles and slow motion cables to make it easier to locate and track astronomical objects But before your journey begins take time to read this manual to f...

Page 4: ...the mount and the mount can no longer pivot up and down 6 Locate the counterweight bar and counterweight Thread the threaded end of the counterweight bar into the Dec axis of the equatorial mount Remove the safety screw and washer from the other end of the counterweight bar Loosen the counterweight locking bolt so that the screw is no longer obstructing the center hole of the counterweight Slide t...

Page 5: ...rimpose the image of a small red dot onto the night sky While keeping both eyes open when looking through the Star Pointer simply move your telescope until the red dot seen through the Star Pointer merges with the object as seen with your unaided eye The red dot is produced by a light emitting diode LED it is not a laser beam and will not damage the glass window or your eye The star pointer is pow...

Page 6: ...re are two options For large and quick movements loosen the right ascension knob when moving the telescope and then tighten the knob when you are near the position you want For very small movements and fine adjustments turn the right ascension cable Unlike the declination cable the right ascension cable has 360 of continuous motion Balancing the Telescope in Right Ascension R A The telescope shoul...

Page 7: ...e right side up but reversed from left to right However when observing straight through with the eyepiece inserted directly into the telescope the image will be inverted Focusing To focus your telescope simply turn the focus knob located directly below the eyepiece holder Turning the knob clockwise allows you to focus on an object that is farther than the one you are currently observing Turning th...

Page 8: ...ving toward the west Motion of the Stars The daily motion of the Sun across the sky is familiar to even the most casual observer This daily trek is not the Sun moving as early astronomers thought but the result of the Earth s rotation The Earth s rotation also causes the stars to do the same scribing out a large circle as the Earth completes one rotation The size of the circular path a star follow...

Page 9: ...4 then the celestial pole is 34 above the northern horizon All a latitude scale does then is to point the polar axis of the telescope at the right elevation above the northern or southern horizon To align your telescope 1 Make sure the polar axis of the mount is pointing due north Use a landmark that you know faces north 2 Adjust the mount in altitude until the latitude indicator points to your la...

Page 10: ...y we have a naked eye star less than a degree away This star Polaris is the end star in the handle of the Little Dipper Since the Little Dipper technically called Ursa Minor is not one of the brightest constellations in the sky it may be difficult to locate from urban areas If this is the case use the two end stars in the bowl of the Big Dipper the pointer stars Draw an imaginary line through them...

Page 11: ...ile southern observers should use the lower set of numbers Remember in the northern hemisphere the right ascension should decrease as the telescope is moved towards the west 4 The right ascension setting circle does not move as the telescope moves in right ascension and thus it must by aligned each time you want to use it to find a new object However you do not need to use a bright star each time ...

Page 12: ...the range of 25x to 120x Higher powers are used mainly for lunar and planetary observing under ideal seeing conditions D De et te er rm mi in ni in ng g F Fi ie el ld d o of f V Vi ie ew w Determining the field of view is important if you want to get an idea of the angular size of the object you are observing To calculate the actual field of view divide the apparent field of the eyepiece supplied ...

Page 13: ...cause the moon to drift out of your field of view You ll have to manually adjust the telescope to keep the moon centered This effect is more noticeable at higher power Consult a current astronomy magazine or your local newspaper to find out the current phase of the moon Lunar Observing Hint To increase contrast and bring out visible detail on the lunar surface try using different filters available...

Page 14: ...ight sky is inky black Sky Illumination General sky brightening caused by the moon aurorae natural airglow and light pollution greatly affect transparency While not a problem when viewing brighter stars and planets bright skies reduce the contrast of extended nebulae making them difficult if not impossible to see To maximize your observing limit deep sky viewing to moonless nights far from the lig...

Page 15: ... you can t get a better location wait until the early morning hours when the surroundings are uniformly cool and seeing is generally better Type 3 seeing conditions are characterized by fast ripples that create shimmer in the visual field affecting otherwise sharp images For extended objects fine details are visible but images shift around the field Stars are crisp points but they rapidly shift sm...

Page 16: ...eighs only 4 oz It works very well with all Celestron eyepieces Exotherm 93504 Perfect for chilly evenings outdoors camping stargazing or at sporting events the Exotherm hand warmer is convenient reusable and made from nontoxic materials Heat lasts up to 1 hour Eyepieces Like telescopes eyepieces come in a variety of designs Each design has its own advantages and disadvantages For the 1 1 4 barrel...

Page 17: ... neutral oxygen emission in our atmosphere Moon Filter 94119 A Celestron s Moon Filter is an economical eyepiece filter for reducing the brightness of the moon and improving contrast so greater detail can be observed on the lunar surface The clear aperture is 21mm and the transmission is about 18 Motor Drive 93514 Allows telescopes to track the motion of the sky once the telescope is polar aligned...

Page 18: ...an enjoy features of the Sun T Adapter 93625 T Adapter with additional T Ring allows you to attach your SLR camera to the rear cell of your Celestron telescope This turns your telescope into a high power telephoto lens perfect for terrestrial photography and short exposure lunar and filtered solar photography A full description of all Celestron accessories can be found in the Celestron Accessory C...

Page 19: ...unction or deterioration due to normal wear is not covered by this warranty CELESTRON DISCLAIMS ANY WARRANTIES EXPRESS OR IMPLIED WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE EXCEPT AS EXPRESSLY SET FORTH HEREIN THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN CELESTRON EXPRESS...

Page 20: ...nce CA 90503 U S A Tel 310 328 9560 Fax 310 212 5835 Web site at www celestron com Copyright 2004 Celestron All rights reserved Products or instructions may change without notice or obligation Item 21076 INST 10 00 01 05 Printed in China ...

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