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Celestron Celestar 8, Инструкция по эксплуатации

Celestron Celestar 8 - Профессиональный телескоп с высоким качеством. Безупречная оптика для наблюдений за звездами. Для полного использования возможностей устройства обязательно ознакомьтесь с руководством пользователя. Вы можете скачать его бесплатно с manualshive.com. Откройте мир космоса с Celestron Celestar 8!

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Celestar Manual

Using the Drive

41

4.

 

The LED above the ON/OFF switch will turn on and the
tracking motor will start tracking.

TRACKING RATE SELECTION

The drive has four basic rates: sidereal, solar, lunar and King.
While solar and lunar rates are obvious, sidereal and King rates
require an little more explaining.  Sidereal rate is based on a
single rotation of the Earth which takes 1,436.5 minutes.  An
astronomer by the name of King discovered that atmosphere
refraction affects the apparent motion of objects across the sky.
The King rate takes into account this refraction caused by the
earth’s atmosphere and is recommended for deep sky
astrophotography.  For deep sky observing, either King or
sidereal rate is fine.

Each of the tracking rates is represented by icons, see Figure 6-
1.  Sidereal rate is represented by a star, solar rate by a sun,
lunar rate by a crescent moon, and King rate by a crown.
Underneath each icon is an LED to indicate which rate has been
selected.  Once the power has been turned on, the drive tracks at
sidereal rate , the default tracking rate.  To change the tracking
rate, press the “RATE” button.  Pressing the button once
changes the drive rate once. The rates are selected sequentially
from left-to-right as listed above.

Note that the PEC function does NOT have to be activated for the drive to work.  However, once the PEC
is activated, the drive rate is locked on the one selection.  You can not change the rates until PEC is turned
off.

PERIODIC ERROR CORRECTION

Periodic Error Correction, or PEC for short, is a  system that  improves the tracking accuracy of the drive
by reducing the number of the user corrections.  PEC is designed to improve photographic quality by
reducing the amplitude of the worm errors.  Using the PEC function is a two-step process.  First, you must
guide for at least 5-1/2 minutes during which time the system records the correction you make.  (It takes
the worm gear 5.41 minutes to make one complete revolution, hence the need to guide for 5-1/2 minutes.)
This “teaches” the PEC chip the characteristics of the worm.  The second step is to play back the
corrections you made during the recording phase. Keep in mind, this feature is for advanced
astrophotographers and requires careful guiding.

Note: All telescope drives have some periodic error.

Here’s how to use the PEC function.

1.

 

Find a bright star relatively close to the object you want to photograph.

2.

 

Insert a high power eyepiece with illuminated cross hairs into your telescope.  Orient the guiding
eyepiece cross hairs so that one is parallel to the declination while the other is parallel to the R.A. axis.

3.

 

Center the guide star on the illuminated cross hairs, focus the telescope, and study the periodic
movement.

Figure 6-2

Refraction caused by the
Earth’s atmosphere makes
celestial objects within 45

°

 of

the horizon appear higher in the
sky then they actual are.  This
refraction also affects the rate at
which stars rise and set.  King
rate takes this refraction into
account.

Содержание Celestar 8

Страница 1: ...1 CELESTAR INSTRUCTION MANUAL ...

Страница 2: ...es 17 MOVING THE TELESCOPE IN R A AND DEC 18 INSTALLING THE R A ENCODER 18 ADVANCED ASTRO MASTER SETUP 21 TRANSPORTING YOUR CELESTAR CELESTAR DELUXE 8 22 STORING YOUR CELESTAR CELESTAR DELUXE 8 22 TELESCOPE BASICS 23 IMAGE ORIENTATION 23 FOCUSING 24 ALIGNING THE FINDER 24 YOUR FIRST LOOK 25 Daytime Observing 25 Nighttime Observing 25 CALCULATING MAGNIFICATION 26 DETERMINING FIELD OF VIEW 27 GENERA...

Страница 3: ...RVING DEEP SKY OBJECTS 47 Using the Setting Circles 47 STAR HOPPING 48 SEEING CONDITIONS 50 Transparency 50 Sky Illumination 50 Seeing 50 CELESTIAL PHOTOGRAPHY 53 SHORT EXPOSURE PRIME FOCUS PHOTOGRAPHY 53 PIGGYBACK PHOTOGRAPHY 54 EYEPIECE PROJECTION 56 LONG EXPOSURE PRIME FOCUS PHOTOGRAPHY 57 CCD IMAGING 60 FASTAR LENS ASSEMBLY OPTION USING YOUR CELESTAR DELUXE TELESCOPE AT F 1 95 WITH OPTIONAL PI...

Страница 4: ...Celestar Manual 4 TECHNICAL SPECIFICATIONS 78 FURTHER READING 79 ...

Страница 5: ...n deals with the basics of telescope use Topics include focusing aligning the finder and taking your first look The third section deals with the basics of astronomy which includes the celestial coordinate system the motions of the stars and polar alignment The fourth section deals with celestial observing covering visual observations of the planets and deep sky objects Using both the setting circl...

Страница 6: ...O IT NEVER USE AN EYEPIECE SOLAR FILTER OR A HERSCHEL WEDGE INTERNAL HEAT BUILD UP INSIDE THE TELESCOPE CAN CAUSE THESE DEVICES TO CRACK OR BREAK ALLOWING UNFILTERED SUNLIGHT TO PASS THROUGH TO THE EYE NEVER LEAVE THE TELESCOPE UNSUPERVISED EITHER WHEN CHILDREN ARE PRESENT OR WITH ADULTS WHO MAY NOT BE FAMILIAR WITH THE CORRECT OPERATING PROCEDURES OF YOUR TELESCOPE NEVER POINT YOUR TELESCOPE AT T...

Страница 7: ... popular among amateur astronomers The Schmidt Cassegrain system consists of a zero power corrector plate a spherical primary mirror and a secondary mirror Once light rays enter the optical system they travel the length of the optical tube three times Inside the optical tube you will notice a black tube not illustrated that extends out from the center hole in the primary mirror This is the primary...

Страница 8: ... standard wedge and the standard adjustable height tripod each are contained in its own box And one box contains all the standard accessories which are 26mm Plössl Ocular 1 1 4 Visual Back 1 1 4 Star Diagonal 1 1 4 9x50mm Finder with Bracket Hand Controller with cable Car Battery Adapter Two 9 volt Alkaline Batteries packaged with telescope Lens Cap packaged with telescope Declination motor with c...

Страница 9: ...Celestar Manual Assembling your Celestar 9 Figure 2 1 Celestar 8 Figure 2 2 Celestar8 Deluxe ...

Страница 10: ...will not separate any further A small stop on the top of each tripod leg presses against the tripod head to indicate maximum separation 3 Rotate the tension knob located underneath the support bracket on the central column clockwise until it is close to the bottom of the central column 4 Turn the leg support bracket until the cups on the end of each bracket are directly underneath each leg 5 Rotat...

Страница 11: ...Computerized Only Your Celestar Deluxe 8 telescope has a clock drive built into the base to track the stars as they move across the sky from east to west However for this drive to be useful the telescope s axis of rotation should be made parallel to the Earth s axis The wedge which comes standard with both telescopes allows you to tilt the telescope s axis of rotation This process is known as pola...

Страница 12: ...old the tilt plat in place They are located on the side plates of the wedge two on each side You ll need a 3 16 Allen wrench 2 Move the tilt plate until the latitude scale indicates the latitude of your observing site The latitude scale is on the side plate The center of the bolt serves as the marker 3 Tighten the socket head screws on the side plates to hold the tilt plate in place You are now re...

Страница 13: ...ush to the tilt plate Do not tighten it fully or you will not be able to move the base enough to insert the two remaining bolts If you do not tighten the bolt at all the drive base may be tilted slightly preventing the remaining two bolts from threading straight in 2 Move the base of the telescope until the two remaining holes in the drive base line up with the holes in the tilt plate on the wedge...

Страница 14: ...umbscrews 10 24x1 2 Two Phillips Pan Head Screws 10 24x5 8 Mounting the finder is a two step process and is the same for the Celestar 8 and the Celestar Deluxe 8 First you mount the bracket to the telescope then mount the finder in the bracket ATTACHING THE FINDER BRACKET 1 Locate the two holes in the rear cell of the telescope just left of center when looking from the back of the tube 2 Remove th...

Страница 15: ... front i e objective end of the finder 4 Slide the end of the finder where the eyepiece mounts into the front of the bracket Push it back until the end of the finder where the eyepiece attaches is past the back ring of the bracket but NOT so far that the O Ring is snug inside the back ring 5 Slide the O Ring toward the back i e eyepiece end of the finder 6 Push the finder back until the O Ring is ...

Страница 16: ...ady to attach other accessories such as eyepieces and diagonal prisms If you want to remove the visual back rotate the slip ring counterclockwise until it is free of the rear cell The Star Diagonal The star diagonal is a prism that diverts the light at a right angle from the light path of the telescope For astronomical observing this allows you to observe in positions that are more comfortable tha...

Страница 17: ...umbscrew on the star diagonal and slide the eyepiece out In addition to barrel diameter eyepieces are also referred to in terms of their focal length The focal length of each eyepiece is printed on the eyepiece barrel The longer the focal length i e the larger the number the lower the eyepiece power and the shorter the focal length i e the smaller the number the higher the magnification Generally ...

Страница 18: ...t Refer to the section Using The Celestar Deluxe Drive in this manual for information on operation and maintenance of the DEC motor For fine adjustments in right ascension release the R A clamp until the R A slow motion knob rotates freely Turn the R A slow motion knob until the desired object is centered Once centered tighten the R A clamp by turning it clockwise The clamp must be sufficiently lo...

Страница 19: ...eluxe 8 Tighten the 6 32x5 16 socket set screw on the side of the R A encoder coupling screw hollow bolt to hold the R A encoder shaft in place 5 For the Celestar Deluxe 8 place the slotted end of the R A bracket over the threaded cylindrical spacer and insert the 8 32x1 4 screw into the threaded cylindrical spacer Tighten the screw to hold the bracket in place refer to figure 2 12 Figure 2 12 6 F...

Страница 20: ...sition Now connect the blue connector on the cable to the five pins on the R A encoder plug the phone jack type connector to the Advanced Astro Master module and the telescope is ready for hours of observing fun Please see the Advanced Astro Master instruction manual for complete operational information R A Encoder Encoder Bracket Encoder Lock Nut Knurled R A Coupling Screw 6 32 Socket Set Screw W...

Страница 21: ... AAM screen should read MODE ALIGN STAR Press the down arrow once to scroll to the MODE SETUP screen 6 Press enter Use the up down arrow to scroll to the appropriate mount For a roughly aligned fork mount i e the Celestar 8 Computerized set the mount type to EQ Press enter If you are accurately polar aligned then set the mount as EP 7 Press enter at the SCROLL 5 window 8 At the Chart screen select...

Страница 22: ...or the Celestar Deluxe since the wedge does not interfere with the tripod at all it can be left in place once firmly attached This holds true even if you are transporting your telescope to a remote dark site observing location The tripod legs can be collapsed and folded back together with the wedge in place However if you are planning a trip to a remote site you should remove the telescope from th...

Страница 23: ...es depending on how the eyepiece is inserted into the telescope When using the star diagonal the image is right side up but reversed from left to right i e reverted If inserting the eyepiece directly into the visual back i e without the star diagonal the image is upside down and reversed from left to right i e inverted This is normal for the Schmidt Cassegrain design These orientations apply to th...

Страница 24: ...counterclockwise ALIGNING THE FINDER The Celestar 8 comes with a 6x30mm finder 9x50mm for Celestar Deluxe 8 which helps you aim the main telescope at distant objects that would be hard to find in the narrow field of the main optics The first number used to describe the finder is the power or magnification while the second number is the diameter of the objective lens in millimeters For example the ...

Страница 25: ... in the finder 6 Lock the R A and DEC clamps to hold the telescope in place 7 Look through the main optics and the object will be there if you aligned the finder first 8 Use the slow motion knobs to center the object if needed Remember you should not use the drive for terrestrial viewing Try using different optional eyepieces to see how the field changes with various magnifications Nighttime Obser...

Страница 26: ...ve is running More on this in the section on Polar Alignment CALCULATING MAGNIFICATION You can change the power of your Celestron telescope just by changing the eyepiece ocular To determine the magnification of your Celestron telescope simply divide the focal length of the telescope by the focal length of the eyepiece used In equation format the formula looks like this Focal Length of Telescope Ma...

Страница 27: ... are a few things to remember to ensure you get the best possible image Never look through window glass Glass found in household windows is optically imperfect and as a result may vary in thickness from one part of a window to the next This inconsistency can and will affect the ability to focus your telescope In most cases you will not be able to achieve a truly sharp image while in some cases you...

Страница 28: ...ng terrestrial photography where exposure times are measured in fractions of a second This also applies to lunar photography and filtered solar photography In deep sky astrophotography the exposures are much longer requiring that you use the B setting on your camera The actual exposure time is determined by how long you keep the shutter open To reduce vibration when tripping the shutter use a cabl...

Страница 29: ...n into degrees minutes of arc and seconds of arc Declination readings south of the equator carry a minus sign in front of the coordinate and those north of the celestial equator are either blank i e no designation or preceded by a plus sign The celestial equivalent of longitude is called Right Ascension or R A for short Like the Earth s lines of longitude they run from pole to pole and are evenly ...

Страница 30: ...y never rise and never set You will never see the stars complete one circle because the sunlight during the day washes out the starlight However part of this circular motion of stars in this region of the sky can be seen by setting up a camera on a tripod and opening the shutter for a couple hours The processed film will reveal semicircles that revolve around the pole This description of stellar m...

Страница 31: ...ft out of the field of view If not using the clock drive all objects in the sky day or night will slowly drift out of the field This motion is caused by the Earth s rotation Even if you are not using the clock drive polar alignment is still desirable since it will reduce the number of corrections needed to follow an object and limit all corrections to one axis R A There are several methods of pola...

Страница 32: ...hem toward the Little Dipper They point to Polaris see Figure 4 5 The position of the Big Dipper changes during the year and throughout the course of the night see Figure 4 4 When the Big Dipper is low in the sky i e near the horizon it may be difficult to locate During these times look for Cassiopeia see Figure 4 5 Observers in the southern hemisphere are not as fortunate as those in the northern...

Страница 33: ...rd the northern horizon This means the pole is now 89 above the northern horizon If you move one degree further south the same thing happens again As you can see from this example the distance from the northern horizon to the celestial pole is always equal to your latitude If you are observing from Los Angeles which has a latitude of 34 then the celestial pole would be 34 above the northern horizo...

Страница 34: ...ntered in the telescope This of course presumes you aligned the finderscope with the main optical tube If not use the fine adjustment controls to center Polaris in the telescope field Figure 4 6 This is how the telescope is to be set up for polar alignment The tube should be parallel to the forks and the mount should point to Polaris Declination Drift Method of Polar Alignment This method of polar...

Страница 35: ...you have eliminated all the drift move to the star near the eastern horizon The star should be 20 degrees above the horizon and within five degrees of the celestial equator If the star drifts south the polar axis is too low If the star drifts north the polar axis is too high Again make the appropriate adjustments to the polar axis to eliminate any drift Unfortunately the latter adjustments interac...

Страница 36: ...the R A indicator The R A setting circle should rotate freely The R A setting circle has a marker every five minutes with each hour labeled The R A setting circle is now aligned and ready to use The R A setting circle is clutched to the R A gear rotation As long as the drive is operating the circle does not need to be reset once indexed to the correct coordinate i e once aligned If the drive is ev...

Страница 37: ...elescope must be polar aligned The process of polar alignment which was discussed earlier in this manual makes the telescope s axis of rotation parallel to the Earth s ensuring that the telescope moves in the right direction Keep in mind that the clock drive moves the telescope only in right ascension at a rate that is half of the hour hand on a clock Therefore the telescope makes one complete rev...

Страница 38: ...ler Optional Accessory Needed to operate the Celestar 8 in the Southern Hemisphere The hand controller 28983 is an optional accessory that can be purchased through your Celestron dealer The hand controller is essential for long exposure deep sky photography For normal observing it serves as a convenient aid for centering objects especially at high power On the hand controller there are four button...

Страница 39: ... buttons down 4 In one or two seconds the red LED will blink This will indicate the telescope is set for the southern hemisphere 5 Keep the hand controller plugged in at all times If you unplug the unit it will default back to northern hemisphere operation The direction of the drive motor is now reversed and will work in the opposite hemisphere CHANGING THE BATTERY Once the battery has been draine...

Страница 40: ...rm gear and the accuracy of the polar alignment The following is a brief discussion of each of the features Figure 6 1 POWERING UP THE DRIVE The Celestar Deluxe comes equipped with two 9 volt batteries and a cigarette lighter adapter The batteries are for convenience and are only meant to run the tracking motor The 9 volt supplied by the batteries is not sufficient to operate the declination motor...

Страница 41: ...the one selection You can not change the rates until PEC is turned off PERIODIC ERROR CORRECTION Periodic Error Correction or PEC for short is a system that improves the tracking accuracy of the drive by reducing the number of the user corrections PEC is designed to improve photographic quality by reducing the amplitude of the worm errors Using the PEC function is a two step process First you must...

Страница 42: ...tory for long exposure deep sky astrophotography The optional Reducer Corrector lens reduces exposure times making the task of guiding a little easier More on each of these forms of astrophotography in the section on Celestial Photography Connectors On the drive base cover are three electrical connectors two modular telephone jacks and one barrel connector power source jack tip positive Starting f...

Страница 43: ...y if you want to slew the telescope east hold the east button down then press the west button The slewing rate is approximately 8x sidereal rate depending on how well your telescope is balanced The slewing function also works in declination with the standard DEC motor If the drive does not respond when the correction buttons have been pressed check to make sure that the hand controller cable is pl...

Страница 44: ...his 1 Remove the four Phillips head screws that hold the drive base cover to the drive base 2 Remove the cover plate by first lifting it up and then sliding it out see Figure 6 4 and Figure 6 5 The internal components of the drive will be visible Caution do not attempt to adjust setting of the drive mechanism Figure 6 4 Figure 6 5 3 Unclip the batteries from the metal holders Clutch Adjustment Kno...

Страница 45: ...EMISPHERE OPERATION To operate the Celestar Deluxe in the Southern hemisphere the direction of the R A tracking motor must be reversed Motor direction can easily be changed by changing the settings of the dip switches on the electronic board under the drive base cover To do this 1 Turn off the Celestar Deluxe drive by switching the On Off switch on the drive base to off and ensure that no power so...

Страница 46: ...l have to manually adjust the telescope to keep the Moon centered This effect is more noticeable at higher power If you are using the clock drive and have polar aligned the Moon will remain centered Consult your local newspaper or a current astronomy magazine to find out when the Moon is visible Lunar Observing Hints To increase contrast and bring out detail on the lunar surface use filters A yell...

Страница 47: ...EEP SKY OBJECTS Deep sky objects are simply those objects outside the boundaries of our solar system They include star clusters planetary nebulae diffuse nebulae double stars and other galaxies outside our own Milky Way Unlike the Sun Moon and five major planets most deep sky objects are not visible to the naked eye Finding them requires using your setting circles or star hopping to them The Celes...

Страница 48: ...cles will get you close to your target but not directly on it Also the accuracy of your polar alignment will affect how accurately your setting circles read At the end of this manual there is a list of deep sky objects well within reach of your Celestar telescope STAR HOPPING Another way to find deep sky objects is by star hopping Star hopping is done by using bright stars to guide you to an objec...

Страница 49: ...lar in brightness making them easy to see 1 Locate the two southern most stars that make up the parallelogram Beta β and Gamma γ Lyra 1 Point the finder half way between these two stars 1 Move about 1 2 toward Beta β Lyra but remaining on a line that connects the two stars 1 Look through the telescope and the Ring Nebula should be in the telescope Its angular size is quite small and therefore not ...

Страница 50: ... see and reducing contrast on brighter objects Aerosols ejected into the upper atmosphere from volcanic eruptions also affect transparency Ideal conditions are when the night sky is inky black Sky Illumination General sky brightening caused by the Moon aurorae natural airglow and light pollution greatly effect transparency While not a problem for the brighter stars and planets bright skies reduce ...

Страница 51: ... telescope approximately 45 minutes to reach thermal equilibrium Once adjusted to the outdoor temperature don t touch the telescope tube with your hands If observing with others make sure no one stands in front of or directly below the telescope tube The images produced by Type 2 seeing conditions don t move as quickly as those produced by Type 1 conditions but the images are quite blurry Fine det...

Страница 52: ...Celestar Manual Celestial Photography 52 ...

Страница 53: ...s the shutter closes whether you were finished with the exposure or not Look for a camera that has a manual shutter when operating in the time exposure mode Olympus Nikon Minolta Pentax Canon and others have made such camera bodies The camera must have interchangeable lenses so you can attach it to the telescope and so you can use a variety of lenses for piggyback photography If you can t find a n...

Страница 54: ...recommended exposure times when photographing the Moon at the prime focus of your Celestar telescope The exposure times listed in table 8 1 should be used as a starting point Always make exposures that are longer and shorter than the recommended time Also take a few photos at each shutter speed This will ensure that you will get a good photo If using black and white film try a yellow filter to red...

Страница 55: ...nated cross hair eyepiece for guiding simply defocus your guide star until it fills most of the field of view This makes it easy to detect any drift 7 Release the shutter using a cable release 8 Monitor your guide star for the duration of the exposure making all corrections using the standard hand controller optional on Celestar 8 If not using the optional DEC motor standard with the Celestar 8 De...

Страница 56: ...ch attaches to the visual back and a T ring for your particular camera make i e Minolta Nikon Pentax etc Because of the high magnifications during eyepiece projection the field of view is quite small which makes it difficult to find and center objects To make the job a little easier align the finder as accurately as possible This allows you to get the object in the telescope s field based on the f...

Страница 57: ... exposure times listed here should be used as a starting point Always make exposures that are longer and shorter than the recommended time Also take a few photos at each shutter speed This will ensure that you get a good photo It is not uncommon to go through an entire roll of 36 exposures and have only one good shot NOTE Don t expect to record more detail than you can see visually in the eyepiece...

Страница 58: ...urpose Celestron offers the Micro Guide Eyepiece 94171 or the 7 5mm Plössl Illuminated Reticle Ocular 94174 Here is a brief summary of the technique 1 Polar align the telescope using the declination drift method 2 Remove all visual accessories 3 Thread the Radial Guider onto your Celestar telescope 4 Thread the T Ring onto the Radial Guider 5 Mount your camera body onto the T Ring the same as you ...

Страница 59: ...olor slide Tech Pan gas hypered black and white print T Max 400 black and white print There is no exposure determination table to help you get started The best way to determine exposure length is look at previously published photos to see what film exposure combinations were used Or take unguided sample photos of various parts of the sky while the drive is running Always take exposures of various ...

Страница 60: ...optional reducer corrector f 10 and f 20 with the optional 2x barlow making it one of the most versatile imaging systems available today This makes the system ideal for imaging deep sky objects as well as planetary detail The key to the Fastar s versatility is the variety of different F numbers in which it can be used Described below is the significance of each F number and the type of object best...

Страница 61: ... F O V 8 1 x 6 3 arc min 13 x 10 arc min 69 x 53 degrees 41 x 31 arc min PixCel Sampling arc sec pixel 75 arc sec 1 2 arc sec 3 8 arc sec Table 8 3 FASTAR CONFIGURATIONS The following is a brief description of the advantages of imaging at each f number configuration and the proper equipment needed to use the telescope in any of its many settings Refer to Figure 8 6 for a more detailed description ...

Страница 62: ...10 imaging is more challenging for long exposure deep sky imaging Guiding needs to be very accurate and the exposure times need to be much longer about 25 times longer than f 1 95 There are only a select few objects that work well at f 10 The moon images fine because it is so bright but planets are still a bit small and should be shot at f 20 The Ring nebula is a good candidate because it is small...

Страница 63: ...ens Assembly 15 T Adapter 5 Tricolor Spacer Ring 16 Cross Hair Eyepiece 6 T 1 Adapter 17 Visual Back 1 7 IR Cutoff Filter for use with Color Filter Wheel 18 Star Diagonal 8 PixCel CCD Camera 19 26mm Plossl Eyepiece 9 Rear Cell Counterweight 20 T Ring for 35mm SLR Camera 10 Radial Guider 21 35mm SLR Camera 11 Microguide Eyepiece 22 2X Barlow Lens For more information about the above accessories ref...

Страница 64: ...ate of your telescope during an observing session If you want to continue observing the dew must be removed either with a hair dryer or by pointing the telescope at the ground until the dew has evaporated If moisture condenses on the inside of the corrector place the telescope in a dust free environment Remove the accessories from the rear cell and point the telescope down This will remove the moi...

Страница 65: ... 1 6 to 1 8 field correction and re center the star by moving the scope before making any improvements or before making further adjustments When using higher power 6mm and above collimation is best accomplished with the telescope in focus In this instance you are observing the Airy disk see Figure 9 1 not the shadow of the secondary housing This stellar image will appear as a bright point of light...

Страница 66: ...olling information cross references Sky Atlas 2000 0 or Uranometria Unlike other digital setting circles which require the use of a clock drive the Advanced Astro Master can be used with or without a clock drive All you have to do is align on any two of the 28 navigational alignment stars in the Advanced Astro Master s data base and you are ready to observe Once aligned the system keeps track of w...

Страница 67: ...y can also be adjusted vertically Included is one 2 5 pound weight Additional counterweights are available in 2 5 94193 and 5 pound 94194 sizes X X Declination Motor 93549 The electric DEC Motor allows you to make corrections to the DEC axis of your Celestar 8 telescope without touching the instrument All corrections are made from the optional hand control box 28983 which eliminates the possibilit...

Страница 68: ...SMA s are very good economical general purpose eyepieces Available in the focal lengths 6mm 10mm 12mm and 25mm standard with the Celestar 8 Plössl Plössl eyepieces have a 4 element lens designed for low to high power observing The Plössl s offer razor sharp views across the entire field even at the edges In the 1 1 4 barrel diameter they are available in the following focal lengths 6 3mm 7 5mm 10m...

Страница 69: ...ct you are interested in and the object will be in the main telescope X X Flashlight 93592 The LED flashlight uses a red LED to allow reading star maps without ruining your night vision The LED flashlight is small only 6 inches long and weighs in at a mere 3 ounces X X Flashlight Night Vision 93588 Celestron s premium model for astronomy using two red LEDs to preserve night vision The brightness i...

Страница 70: ...of the telescope This way the camera can photograph with its normal or wide angle lens while you guide through the telescope The piggyback mount attaches to the rear cell of the telescope next to the finder X X Planisphere A map of the night sky oriented by month and day to display exactly which stars and planets will be visible There are three different models to match the latitude from which you...

Страница 71: ... it is a very small amount It should be noted that most Barlow lenses can NOT be inserted into the visual back when the skylight filter is attached X X Solar Filter 94162 The Celestron Solar Skreen solar filter permits direct observation of the Sun in complete safety This filter which transmits 001 of visible light allows you to see sunspots as they move across the solar disk In addition to reduci...

Страница 72: ...iece is installed This accessory is used for eyepiece projection photography which allows you to capture very high power views of the Sun Moon and planets on film The tele extender fits over the eyepiece onto the visual back X X Tripod and Wedge For the serious astrophotographer and CCD imager Celestron offers a wedge and tripod that allows you to accurately polar align your Celestar and adds rigi...

Страница 73: ...D Neb Lagoon Nebula M9 NGC 6333 Oph 17 19 2 18 31 7 9 Gl Cl M10 NGC 6254 Oph 16 57 2 4 06 6 6 Gl Cl M11 NGC 6705 Sct 18 51 1 6 16 5 8 Op Cl Wild Duck Cluster M12 NGC 6218 Oph 16 47 2 1 57 6 6 Gl Cl M13 NGC 6205 Her 16 41 7 36 28 5 9 Gl Cl Hercules Cluster M14 NGC 6402 Oph 17 37 6 3 15 7 6 Gl Cl M15 NGC 7078 Peg 21 30 0 12 10 6 4 Gl Cl M16 NGC 6611 Ser 18 18 9 13 47 6 0 D Neb Eagle Nebula M17 NGC 6...

Страница 74: ...ya 8 13 8 5 48 5 8 Op Cl M49 NGC 4472 Vir 12 29 8 8 00 8 4 El Gx M50 NGC 2323 Mon 7 03 0 8 20 5 9 Op Cl M51 NGC 5194 5 CVn 13 29 9 47 12 8 1 Sp Gx Whirlpool Galaxy M52 NGC 7654 Cas 23 24 2 61 35 6 9 Op Gx M53 NGC 5024 Com 13 12 9 18 10 7 7 Gl Cl M54 NGC 6715 Sgr 18 55 1 30 29 7 7 Gl Cl M55 NGC 6809 Sgr 19 40 0 30 58 7 0 Gl Cl M56 NGC 6779 Lyr 19 16 6 30 11 8 2 Gl Cl M57 NGC 6720 Lyr 18 53 6 33 02 ...

Страница 75: ...4501 Com 12 32 0 14 25 9 5 Sp Gx M89 NGC 4552 Vir 12 35 7 12 33 9 8 El Gx M90 NGC 4569 Vir 12 36 8 13 10 9 5 Sp Gx M91 NGC 4548 Com 12 35 4 14 30 10 2 Sp Gx M92 NGC 6341 Her 17 17 1 43 08 6 5 Gl Cl M93 NGC 2447 Pup 7 44 6 23 52 6 2 Op Cl M94 NGC 4736 CVn 12 50 9 41 07 8 1 Sp Gx M95 NGC 3351 Leo 10 44 0 11 42 9 7 Sp Gx M96 NGC 3368 Leo 10 46 8 11 49 9 2 Sp Gx M97 NGC 3587 UMa 11 14 9 55 01 11 2 P N...

Страница 76: ...ns Sp Gx Spiral Galaxy El Gx Elliptical Galaxy Ir Gx Irregular Galaxy Op Cl Open Cluster Gl Cl Globular Cluster D Neb Diffuse Nebula P Neb Planetary Nebula NOTE All coordinates for the objects in the Messier catalog are listed in epoch 2000 00 ...

Страница 77: ...02 0 01 Vega Lyr 18 3656 38 4701 0 04 Capella Aur 05 16 41 45 59 53 0 05 Rigel Ori 05 14 32 08 12 06 0 14 Procyon CMi 07 38 18 05 1330 037 Betelgeuse Ori 05 55 10 07 24 26 OA1 Achernar Eri 01 3743 57 14 12 0 60 Hadar Cen 14 03 49 60 22 22 0 63 Altair Aqi 19 5047 08 52 06 0 77 Aldebaran Tau 04 35 55 16 30 33 0 86 Spica Vir 13 25 12 11 0941 091 Antares Sco 16 29 24 26 25 55 0 92 Fomalhaut PsA 22 57 ...

Страница 78: ...ng Circle Diameter Northern Hemisphere 6 3 4 Celestar 8 and Celestar 8 Computerized 7 3 4 Celestar Deluxe 8 and Celestar Deluxe 8 Computerized R A Setting Circle Diameter Southern Hemisphere 7 3 4 Celestar 8 and Celestar 8 Computerized 8 3 4 Celestar Deluxe 8 and Celestar Deluxe 8 Computerized DEC Setting Circle Diameter 4 DEC Slow Motion Resolution 6 turns per degree DEC Slow Motion Maximum Angle...

Страница 79: ...6 Star Atlas Dickinson Costanzo Chaple NGC 2000 0 Sinnott General Observational Astronomy The Cambridge Astronomy Guide Liller Mayer A Complete Manual Of Amateur Astronomy Sherrod The Guide To Amateur Astronomy Newton Teece Visual Observation Observational Astronomy For Amateurs Sidgwick Astronomical Calendar Ottewell Burnham s Celestial Handbook Vols 1 2 dc 3 Burnham The Planet Jupiter Peek Field...

Страница 80: ...t to CI accessories and electronic features and shall be deemed to limit the obligation of CI under any other provisions of this warranty WARRANTY CI shall use reasonable effort to repair or replace any product covered by this limited warranty within thirty days of receipt In the event repair or replacement shall require more than thirty days CI shall notify the customer accordingly CI reserves th...

Страница 81: ...t Celestron International Customer Service Department 2835 Columbia Street Torrance CA 90503 310 328 9560 310 212 5835 Fax Monday Friday 8AM 4PM PST This warranty supersedes all other product warranties NOTE This warranty is valid to U S A customers who have purchased this product from an Authorized CI Dealer in the U S A Warranty outside the U S A is valid only to customers who purchased from a C...

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