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Celestron CPC DELUXE 1100 HD, Instruction Manual, Page: 18 / 75

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to rebalance. When you are ready to slew the telescope to your next 

‘„Œ‡…–ǡŒ—•–”‡‡„‡”–‘ƒ—ƒŽŽ›”‡–—”–Š‡–—„‡–‘–Š‡•ƒ‡„”‹‰Š–

star and carefully center it in the eyepiece. Using this tool will invalidate 
the PEC index

Periodic Error Correction (PEC) –

 PEC is designed to improve 

photographic quality by reducing the amplitude of the worm gear errors 

and improving the tracking accuracy of the drive. This feature is for 
advanced astrophotography and is used when your telescope is polar 

ƒŽ‹‰‡†™‹–Š–Š‡‘’–‹‘ƒŽ‡“—ƒ–‘”‹ƒŽ™‡†‰‡Ǥ ‘”‘”‡‹ˆ‘”ƒ–‹‘‘

using PEC, see the section on 

“Celestial Photography”

.

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Summary of Contents for CPC DELUXE 1100 HD

Page 1: ...ēĘęėĚĈęĎĔē ĆēĚĆđ 11007 11008 11009 ...

Page 2: ... www celestron com 1 2 4 7 8 17 18 19 20 22 23 24 25 29 30 31 31 32 ǧ 33 34 ǧ 34 36 ȃ ǧ 37 ȃ 38 39 ȃ 40 45 46 47 ...

Page 3: ... optical systems give amateur astronomers the most sophisticated and easy to use telescopes available on the market today Take time to read through this manual before embarking on your Ǥ become familiar with yourCPC so you should keep this manual handy until you have fully mastered your telescope s operation TheCPC hand control has built in instructions to guide you through all the alignment proce...

Page 4: ... www celestron com 3 Ǥ ȋ Ȍ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ȁ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ǥ Ȁ ơ Ǥ Ǥ Ǥ ĊđĚĝĊ čĔĜē 8 9 1 3 4 5 15 6 7 10 11 12 13 14 A B C D E F 2 11 ...

Page 5: ...e shipped with the leg support bracket detached so the tripod legs can collapse To set up the tripod 1 Hold the tripod with the head up and the legs pointed toward the ground 2 Pull the legs away from the central column until they will not separate any further The top of each tripod leg presses against the tripod head to indicate maximum separation Ǥ ǡ Ǥ Ƥ Ǧ Ǥ 4 Place the leg support bracket over ...

Page 6: ... be tightened down for the telescope to be aligned for GoTo use Any manual movement of the telescope will invalidate your telescope s alignment ǡ Ƥ knob while holding the telescope tube by the rear cell handle Rotate the tube upwards until it is level with the ground and tighten the locking knob Note When transporting your telescope make sure that both clutches are somewhat loose this will diminis...

Page 7: ... Ǥdz Barrel diameter is the diameter of the barrel that slides into the star diagonal or visual back TheCPC uses eyepieces with a standard 1 1 4 barrel diameter ĎĘĚĆđ ĆĈĈĊĘĘĔėĎĊĘ ċĔė ęčĊ Ǥ Ȁ dz ǧ dz dz TheFinderscope Ƥ Ǥ Ƥ Ƥ Ƥ ǡ ǡ Ǥ ǡ Ƥ Ƥ Ǥ Finderscope Installation Ƥ Ƥ Ǧ bracket then attached to the rear cell of the telescope To install Ƥ ǣ Ǥ Ƥ Ƥ Ǥ Ƥ Ǥ Ǥ ǡ when looking from the back of the tube 3 Plac...

Page 8: ...with the directional change Ƥ Ǥ Attaching the HandControl ǡ unit has been packaged along with the other telescope accessories and will need to be plugged in to the drive base of your telescope The hand ȋ Ƥ 3 10 Your telescope also comes with a hand control holder that must be attached to the fork arm To connect the hand control to the fork arm ǧ Ȉ ȋ Ƥ Ǧ ȌǤ Ȉ Ǥ The hand control can now rest in the ...

Page 9: ... in the sky pairs trios and clusters that are well suited forCCD imaging with theCPC telescope Ǧ Ǥ Ǧ Ǥ 5 ǣ selected from the NexStar database Ǥ ǣ ǡ for the current date and time and automatically slews theCPC to Ǥ Ǥ ǣ Pressing Enter allows you to select any of theCPC functions and accept entered parameters 8 ǣ Undo will take you out of the current menu and display the previous level of the menu pa...

Page 10: ...e bright celestial Ǥ ǡ it is not necessary to know the name of the stars that you are aiming at You may even select a planet or the Moon TheCPC is then ready to start Ƥ ǡ ή Ǥ Before the telescope is ready to be aligned it should be set up in an ȋ ǡ Ƥ Ȍ attached and lens cover removed as described in theAssembly section of the manual To begin SkyAlign Ǥ ƪ Dz dz Ǥ ǡ control display will say CPC Ready ...

Page 11: ...in the Ƥ Ǥ ǡ accept this star as your second alignment star When the telescope has been aligned to both stars the display will read Alignment Success and Ƥ Ƥ Ǥ Two StarAlignment With the two star alignment method theCPC requires the user to know the positions of two bright stars in order to accurately align the telescope Ƥ Ǥ Ǧ star alignment procedure Ǥ ǡ ȋ Ȍ selectTwo StarAlign and press ENTER 2 ...

Page 12: ...d on an optional equatorial wedge Similar to theAltazimuth alignments described earlier the EQ alignments gives ǡ Ǧ ǡ Ǧ Star alignment or Solar System alignment EQAutoAlign The EQAutoAlign uses all the same time site information as theAlt Az alignments however it also requires you to position the tube so that the ȋ Ƥ Ǧ Ȍǡ ȋ Ƥ 4 3 Based on this information theCPC will automatically slew to two sele...

Page 13: ... Each list is broken down ǣ ǡ ǡ ǡ ǡ Ǥ Ǧ Ǥ ȋ Ȍ Ǥ When scrolling through a long list of objects holding down either theUP or DOWN key will allow you to scroll through the catalog at a rapid speed Pressing any of the other catalog keys M CALD NGC or STAR will display a blinking cursor below the name of the catalog chosen Use Ǥ ǡ Ƥ ǡ M key and enter 042 ǡ Ƥ Ǥ Ƥ four digits are entered the hand control...

Page 14: ...that allows you to instantly speed up the motors without having to choose a speed rate To use this feature simply press the arrow button that corresponds to the direction that you want to move the telescope While holding that button down press the opposite directional button This will increase the slew rate to the maximum slew rate When pressing the Up and Down arrow buttons in the slower slew ȋ Ȍ...

Page 15: ...e Ǥ Ǥ Save Database Db Object This feature allows you to create your Ǥ Ǥ Enter R A Dec Ƥ Ǥ Ǥ Ǥ Scroll to the Enter RA DEC command and press ENTER The display Ƥ Ǥ Ǥ Ǥ GoToObject Ƥ database scroll down to either GoTo Sky Obj or GoTo Land Obj and Ǥ TheCPC will automatically retrieve and display the coordinates before Ǥ Ƥ ǡ Ƥ Ǥ Ƥ Ǥ Get RA DEC Displays the right ascension and declination for the curren...

Page 16: ... directions you see a pause in the star movement after the button has been pressed ǡ when pressing or releasing the button Now enter the same values Ǥ releasing the button but setting the values lower results in a pause when pressing the button go with the higher value for positive but use a lower value for negative CPC will remember these values and use them each time it is turned on until they a...

Page 17: ... ask you to press the 0 key before returning to the factory default setting Version Selecting this option will allow you to see the current version Ǥ Ƥ Ǥ ǡ Ǣ Ƥ numbers are for azimuth and the second set are for altitude Get Axis Position Displays the relative altitude and azimuth for the current position of the telescope GoTo Axis Position Ƥ position and slew to it Hibernate Hibernate allows theCP...

Page 18: ...rrection PEC PEC is designed to improve photographic quality by reducing the amplitude of the worm gear errors and improving the tracking accuracy of the drive This feature is for advanced astrophotography and is used when your telescope is polar Ǥ using PEC see the section on Celestial Photography ĊēĚ ėĊĊ čĎĘ ċĎČĚėĊ ĎĘ Ć ĒĊēĚ ęėĊĊ ĘčĔĜĎēČ ęčĊ ĘĚćǦĒĊēĚĘ ĆĘĘĔĈĎĆęĊĉ ĜĎęč ęčĊ ĕėĎĒĆėĞ ĈĔĒĒĆēĉ ċĚēĈęĎĔē...

Page 19: ...f its travel on the focusing mechanism Turn the knob in Ǥ ǡ Ǥ primary mirror only slightly Therefore it will take many turns about 30 ȋ Ȍ Ƥ Ǥ ǡ ơ ǡ ƥ Ǥ ǡ you can go right through focus without seeing the image To avoid this ǡ Ƥ ȋ Moon or a planet so that the image is visible even when out of focus Critical focusing is best accomplished when the focusing knob is turned Ǥ ǡ Ǥ ǡ visually and photogra...

Page 20: ...ėĒĎēĎēČ ĎĊđĉ Ĕċ ĎĊĜ Ƥ Ǥ Ƥ ǡ Ƥ ȋ Ȍ Ƥ Ǥ ǡ formula looks like this ǡ Ƥ ǡ Ƥ Ǥ ǡ Ƥ Ǥ Ú Ƥ λǤ λ Ƥ ǡ Ǥ Ƥ Ǥ λǡ almost a full degree To convert degrees to feet at 1 000 yards which is more useful for terrestrial observing simply multiply by 52 5 Continuing with our ǡ Ƥ Ǥ λ Ǥ Ǥ Ƥ Ǥ Ƥ ȋ ȌǤ ėĚĊ ĎĊđĉ Ȃ Ƥ ĊēĊėĆđ ćĘĊėěĎēČ ĎēęĘ When working with any optical instrument there are a few things to remember to ensure y...

Page 21: ...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 follows depends on where it is in the sky Stars near the celestial equator form the largest circles rising in the east and setting in the west Moving toward t...

Page 22: ...lign Wedge Ȃ slewing your telescope to any bright star in the telescope s database select the AlignWedge option The telescope will then re slew to the same star Ǥ Ƥ Ǥ 2 Then accurately center the star in your eyepiece and press Ǥ Dz dz the position that the star should be if it were accurately polar aligned ȋ Optional Accessories or a high power eyepiece to precisely center the Ƥ Ǥ Ǥ star in the cen...

Page 23: ...in what direction Although declination drift is simple and straight forward it requires a great deal Ƥ Ǥ drift method should be done after any one of the previously mentioned methods has been completed To perform the declination drift method you need to choose two Ǥ south near the meridian Both stars should be near the celestial ȋ Ǥ Ǥǡ λ ȌǤ one at a time and in declination only While monitoring a ...

Page 24: ...ot if it is visible at the time ȌǤ ǡ Jupiter as they orbit the giant planet Saturn with its beautiful rings is easily visible at moderate power PlanetaryObserving Hints Ȉ factor on how much planetary detail will be visible So avoid observing the planets when they are low on the horizon or when they are directly over a source of radiating heat such as a rooftop or chimney See SeeingConditions later...

Page 25: ...ng caused by the Moon aurorae natural airglow and ơ Ǥ brighter stars and planets bright skies reduce the contrast of extended ƥ ǡ Ǥ observing limit deep sky viewing to moonless nights far from the light Ǥ Ƥ sky viewing from light polluted areas by blocking unwanted light while Ǥ ǡ hand observe planets and stars from light polluted areas or when the Moon is out ėĆēĘĕĆėĊēĈĞ ơ clouds moisture and oth...

Page 26: ...ĒĊ ĔĈĚĘ čĔęĔČėĆĕčĞ Short exposure prime focus photography is the best way to begin Ǥ telescope without an eyepiece or camera lens in place To attach your Ǧ ȋ Ȍ Ǧ Ƥ ȋ Ǥ Ǥǡ ǡ ǡ ǤȌǤ TheT Ring replaces the 35 mm SLR camera s normal lens Prime focus Ǥ To attach your camera to your telescope Ǥ Ǥ ȋ Ǥ dz dz also remove the 3 adapter plate threaded onto the rear of the tube 2 Thread theT Ring onto theT Adapt...

Page 27: ...rd the date telescope exposure duration eyepiece Ȁ ǡ Ƥ Ǥ eyepiece All exposure times are listed in seconds or fractions of a second ǧ ĊĈĔĒĒĊēĉĊĉ ĊĝĕĔĘĚėĊ ęĎĒĊ ċĔė ĕčĔęĔČėĆĕčĎēČ ĕđĆēĊęĘǤ Planet ISO 50 ISO 100 ISO 200 ISO 400 Moon 4 2 1 1 2 Mercury 16 8 4 2 Venus 1 2 1 4 1 8 1 15 Mars 16 8 4 2 Jupiter 8 4 2 1 Saturn 16 8 4 2 The exposure times listed here should be used as a starting point Always ma...

Page 28: ...utes This will help you familiarize yourself with the periodic error of the drive and the operation of the hand control Remember to ignore declination drift when programming the PEC Note When recording PEC only the photo guide rates rates 1 and 2 will be operational This eliminates the possibility of moving the telescope suddenly while recording 5 To begin recording the drive s periodic error pres...

Page 29: ...l planetary nebulae f 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 Ȁ Ǥ Ȁ Ǥ Ƥ ǡ should be shot at f 20 The Ring Nebula is a good candidate because it is Ǥ ȋ Ȍ Ǧ seconds at f 10 The longer the exposure the better Planetary or Lunar f 20 is a great way to image the planets a...

Page 30: ...2 MODEL CONFIGURATION CONFIGURATION 8 80 2032 mm 16 406 4 mm 9 25 93 2350 mm 18 5 470 mm 11 110 2800 mm 23 1 587 mm AutoGuiding TheCPC has a designated auto guiding port for use with aCCD Ǥ Ǧ cable to theCPC and calibrating the autoguider Note that the four outputs are active low with internal pull ups and are capable of sinking 25 mA DC 1 No Connect 2 Ground 3 RA Right 4 DEC Up 5 DEC Down 6 RA Le...

Page 31: ...when cleaning any instrument so as not to damage the optics ǡ ȋ of camel s hair or a can of pressurized air Spray at an angle to the lens for approximately two to four seconds Then use an optical cleaning solution and white tissue paper to remove any remaining debris Apply the solution to the tissue and then apply the tissue paper to the lens Low pressure strokes should go from the center of the c...

Page 32: ... amount Ǥ Ƥ ǡ Ǥ the same direction then continue turning the screw s in the same Ǥ Ƥ ơ ǡ the new direction ǧ ĈĔđđĎĒĆęĊĉ ęĊđĊĘĈĔĕĊ ĘčĔĚđĉ ĆĕĕĊĆė ĘĞĒĒĊęėĎĈĆđ ĜĎęč ęčĊ ĈĊēęėĆđ ĔćĘęėĚĈęĎĔē ĈĊēęĊėĊĉ Ďē ęčĊ ĘęĆėǯĘ ĉĎċċėĆĈęĎĔē ĕĆęęĊėēǤ Ǥ ǡ Ƥ Ǥ ȋ Ǥ Ǥǡ Ȍ ǡ ƥ Ǥ Wait until a better night if it is turbulent or aim to a steadier part of the Ǥ Ǥ Ƥ Ǥ ǡ the accessories are listed in alphabetical order ȋ Ǧ Ȍ ȂThis...

Page 33: ...tion making the acquisition of a guide star quite easy Second the prism angle is tunable allowing you to look at guide stars on axis This accessory works especially well with the Reducer Corrector Ǧ ȂThis T Adapter allows you to attach your 35 mm DSLR camera to the prime focus of your EdgeHD telescope This arrangement is used for terrestrial photography and short exposure lunar and Ǥ long exposure...

Page 34: ...ayleigh Criterion 68 arc seconds 59 arc seconds 50 arc seconds Dawes Limit 57 arc seconds 49 arc seconds 42 arc seconds Light Gathering Power 843x 1127x 1593x Near Focus with Standard Eyepiece 25 feet 40 feet 100 feet or Camera Field of View Standard Eyepiece 85º 8º 67º Linear Field of View at 1000 yds 44 ft 42 ft 35 ft Optical Tube Length 17 22 24 Weight of Telescope 42 lbs 58 lbs 65 lbs Weight o...

Page 35: ... Distance above or below the celestial horizon Aperture ǯ Ǣ the larger the aperture the greater the telescope s Ȃ Ǥ Apparent A measure of the relative brightness of a Magnitude by an observer on Earth Arc minute Ȁ a degree Arc second Ȁ ǡ ȋ Ȁ ȌǤ Asterism ƥ night sky Asteroid A small rocky body that orbits a star Astrology Ƥ ƪ ơ Ǣ astrology has nothing in common with astronomy Astronomical The dista...

Page 36: ...nce line in the sky that starts at the North celestial pole and ends at the South celestial pole and Ǥ ǡ the meridian starts from your Southern horizon and passes directly overhead to the North celestial pole Messier primarily looking for comets Comets are hazy ơ that were not comets to help his search This catalog became the MessierCatalog M1 through M110 N Nebula Ǥ cloudy appearance NorthCelesti...

Page 37: ...The totality of astronomical things events relations Ǥ V VariableStar A star whose brightness varies over time due to either inherent properties of the star or something eclipsing or obscuring the brightness of the star W Waning Moon The period of the Moon s cycle between full and new when its illuminated portion is decreasing Waxing Moon The period of the Moon s cycle between new and full when it...

Page 38: ...4000 10 characters returned 12AB Azm comma 4000 Alt Get RA Dec E 34AB 12CE Scope must be aligned Cancel GoTo M Is GoTo in Progress L or 1 0 No 1 Yes Ǥ HC version V 1 6 Version 1 6 Stop Start Tracking Tx Alt Az tracking x 0 Tracking off requires alignment x 1 Alt Az on x 2 EQ N x 3 EQ S 32 bit GoTo RA Dec r34AB0500 12CE0500 32 bit get RA Dec e 34AB0500 12CE0500 The last two characters will always b...

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Page 43: ...42 www celestron com ...

Page 44: ... www celestron com 43 ...

Page 45: ...44 www celestron com ...

Page 46: ... www celestron com 45 ...

Page 47: ...ĕĊ ĚėĆęĎĔē ĔĈĆęĎĔē 2001 Dec 14 Annular 03m53s North America Hawaii 2001 Jun 21 Total 04m57s South Africa Madagascar 2002 Dec 04 Total 02m04s S Africa Indonesia Australia 2002 Jun 10 Annular 00m23s West Midwest Hawaii Alaska 2003 May 31 Annular 03m37s Alaska 2003 Nov 23 Total 01m57s Australia New Zealand S America 2005 Apr 08 Partial 00m42s Florida Southwest 2006 Mar 29 Total 04m07s Africa Europe A...

Page 48: ...ith a brief description of any claimed defects Parts or product for which replacement is made shall become the property ofCelestron ǡ ǡ Ǥ ơ Ǥ the event repair or replacement shall require more than thirty days Celestron shall notify the customer accordingly Celestron reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value a...

Page 49: ...ded for those 13 years of age and older OLUMBIA 3TREET s 4ORRANCE 5 3 4ELEPHONE s AX FCC Statement This device complies with Part 15 of FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 This device must accept any interference received including interference that may cause undesired operation Ǥ Ǥ ...

Page 50: ...A FLEXIBLE IMAGING PLATFORM AT AN AFFORDABLE PRICE Superior flat field coma free imaging by the Celestron Engineering Team Ver 04 2013 For release in April 2013 ...

Page 51: ...ives Our classic SCT has three optical components a spherical primary mirror a spherical secondary mirror and a corrector plate with a polynomial curve As every amateur telescope maker and professional optician knows a sphere is the most desirable optical figure In polishing a lens or mirror the work piece moves over a lap made of optical pitch that slowly conforms to the glass surface Geometricall...

Page 52: ...EdgeHD series consists of four aplanatic telescopes with 8 9 25 11 14 inch apertures The optical design of each instrument has been individually optimized to provide a flat coma free focal plane Each EdgeHD optic produces sharp images to the edge of the view with minimal vignetting EdgeHD Series ...

Page 53: ...we wanted to produce equally fine imaging telescopes at a more consumer friendly price As we ve already noted our most important design goal for the new telescope was to eliminate coma and field curvature over a field of view large enough to accommodate a top of the line full frame digital SLR camera or larger astronomical CCD camera This meant setting the field of view at 42 mm in diameter Of course ...

Page 54: ...ms compare the center to edge optical performance of the classic SCT coma free SCT and EdgeHD The EdgeHD clearly outperforms the other optical systems The classic SCT shows prominent coma The coma free SCT is indeed free of coma but field curvature causes its off axis images to become diffuse and out of focus In comparison the EdgeHD s spot pattern is tight concentrated and remains small from on ax...

Page 55: ...oma free SCT you can see that off axis images in the classic SCT images are strongly affected by coma As expected the images in the coma free design do not show the characteristic comatic flare but off axis they do become quite enlarged This is the result of field curvature Figure 3 illustrates how field curvature affects off axis images In an imaging telescope we expect on axis and off axis rays to ...

Page 56: ...tly on the baffle tube causing the image to shift In the classic SCT the shift does not significantly affect on axis image quality However in the EdgeHD off axis images could be affected Because the baffle tube carries the sub aperture corrector inside and the primary mirror on the outside we manufacture it to an extremely tight diametric tolerance The tube that supports the primary was redesigned wi...

Page 57: ...ated careful testing guarantee that the telescope will not only perform well for high power planetary viewing but will also cover a wide angle field for superb edge to edge imaging Nevertheless we don t take this on faith both before and after assembly we test and tune each set of optics Celestron s founder Tom Johnson invented the breakthrough process used to make Celestron s corrector plates Over...

Page 58: ...of low expansion borosilicate glass Like the primaries the secondaries are edged and centered then ground and polished The secondary is a convex mirror so during manufacture it is tested against a concave precision reference matchplate to check both its radius of curvature and figure The secondary mirrors are also brought to the QA Interferometry Lab where the radius and irregularity of each mirror...

Page 59: ...he Pelican Nebula testifies to the EdgeHD s ability to focus clean neat round star images from center to edge The telescope was a 14 inch EdgeHD on a CGE Pro Mount the CCD camera was an Apogee U16m The mage above shows a 21 5 29 8mm section cropped from the original 36 8mm square image EDGEHD S CLOSE UP ON THE PELICAN NEBULA ...

Page 60: ... conduct the FAT on an optical test bench in a specially constructed temperature controlled room Figure 12 Rather than use laser light for this test we use white light so that the FAT reproduces the same conditions an observer would experience while viewing or photographing the night sky To avoid placing any heat sources in the optical path the light for our artificial star is carried to the focus ...

Page 61: ...sual back and this accepts a 1 inch Star Diagonal that will accept any standard 1 inch eyepiece The EdgeHD 925 1100 and 1400 feature a heavy duty flange with a 3 290 16 tpi threaded flange This oversize flange allows you to attach heavy CCD cameras and digital SLR cameras For visual observing use the adapter plate supplied with each telescope to attach the Visual Back The 2 inch XLT Diagonal also sup...

Page 62: ... only are they strong but they also hold your camera perfectly square to the light path To mount a high performance video camera add the T Adapter plus a T to C adapter Like the T mount system the C mount system is an industry standard It uses 1 32 tpi threads with a back focus distance of17 5mm For consumer video systems such as electronic eyepieces planetary cameras and webcams that attach to th...

Page 63: ...1 focus The linear field of view is still 42mm diameter but the angular field is 43 larger and exposure times drop by a factor of two For super fast super wide imaging the EdgeHD telescope series supports Starizona s Hyperstar lens Mounted on the corrector plate in place of the secondary mirror the Hyperstar provides an ƒ 1 9 focal ratio on the EdgeHD 1400 and ƒ 2 0 or ƒ 2 1 on the 800 925 and 1100 ...

Page 64: ...ut optical design fabrication and testing 11 REFERENCES DeVany Arthur S Master Optical Techniques John Wiley and Sons New York 1981 Fischer Robert E Biljana Tadic Galeb and Paul R Yoder Optical System Design McGraw Hill New York 2008 Geary Joseph M Introduction to Lens Design Willmann Bell Richmond 2002 Malacara Daniel ed Optical Shop Testing John Wiley and Sons New York 1978 Rutten Harrie and Mar...

Page 65: ...ure A1 the left column shows the Airy disk for a telescope with a central obstruction of 34 Because the light in the Airy disk is concentrated into a smaller area in the center capturing all of the image detail in a planetary or lunar image requires using a 2x or 3x Barlow lens to further enlarge the Airy disk Unfortunately ideal conditions are fleeting During a typical CCD exposure atmospheric tur...

Page 66: ...using an APS C digital SLR camera relative illumination falls to 84 at the extreme corners of the image Although for bright subjects this minor falloff would pass unnoticed for imaging faint objects we recommend making and applying flat field images for the best results For CCD imaging we always recommend making flat field images Portability and affordability are the hallmarks of the EdgeHD 800 Althou...

Page 67: ...alanced On a night of average seeing stars will display a FWHM of 23μm comparable in size to the spot pattern at the very edge of a 42mm field Relative illumination in the EdgeHD 925 is excellent The central 12mm is completely free of vignetting while field edges receive 90 relative illumination For most imaging applications flat fielding would be optional For full field imaging on a tight budget the E...

Page 68: ...ital SLR camera flats are unnecessary For monochrome imaging with an astronomical CCD camera we always recommend making flat field images On nights when the seeing achieves 1 5 arcseconds FWHM star images shrink to 18μm at the focal plane On such nights the EdgeHD 1100 delivers fine images over a 30mm image circle and well defined stars over the full 42mm field The EdgeHD 1100 is a serious telescope Its...

Page 69: ...ay its full resolution only on the finest nights Relative illumination is 100 across the central 16mm and falls slowly to 83 in the extreme corners of a full frame 35mm image sensor We have seen excellent results when the 14 inch EdgeHD is used with a KAF 16803 CCD camera over a 50mm circle The EdgeHD 1400 is a massive telescope well suited to a backyard observatory or well planned away from home e...

Page 70: ...eld eyepieces We designed three EdgeHD 0 7x focal reducers each specifically tailored to the EdgeHD 1400 1100 and 800 respectively The 1400 and 1100 reducers contain five precision optical elements while the 800 contains four elements To attain a level of performance worthy of the EdgeHD the designs employ low dispersion lanthanum rare earth glass to control both chromatic and geometric aberrations ...

Page 71: ...D the spots demonstrate that the focal reducer s star images are even smaller than those of the telescopes For observers who wish to pursue faint nebulae in RGB or in narrowband the 0 7 Focal Reducer is a valuable accessory that halves the necessary exposure time with no sacrifice in resolution or image quality 5 75 inches 146 05 0 5 mm EdgeHD 1100 and 1400 Large T Adapter T Ring Adapter Digital SL...

Page 72: ...rom one side to the other star images are sharp crisp and round As you process your image fine details in the target object reveal themselves Star clouds delicate dust lanes subtle HII regions it s all there credit to your skill and the design of your EdgeHD telescope The image shown here is a single monochrome 10 minute exposure taken with an Apogee U16 camera KAF 16803 CCD chip and a Celestron Ed...

Page 73: ...The Celestron EdgeHD 2013 by Celestron All rights reserved Torrance CA 90503 U S A www celestron com ...

Page 74: ... focal length guidescope and ring package for piggyback guiding during astro imaging NexGuide Autoguider NexGuide stand alone autoguider eliminates the need for a laptop computer for guiding during long exposure imaging CPC Deluxe 1100 HD 11009 Nightscape CCD Camera 95555 NexGuide Autoguider 93713 80 mm Guidescope Package 52309 HD Pro Wedge Mount 93664 Combining Celestron s newly designed dual for...

Page 75: ...e GPS alignment improved ergonomics enhanced computerization unsurpassed optical quality and most importantly affordability As a visual instrument the EdgeHD optical system delivers pinpoint images across your widest field eyepiece providing you stunning clarity and sharpness that will leave you wanting more When used for astro imaging with our new Nightscape or your own favorite CCD or DSLR camer...

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