Post on 01-Jun-2020
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TALREFRACTING TELESCOPES TAL-�00RS TAL-�25R
INSTRuCTIONmANuAL
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NPZ Optics State Corp.(Novosibirsk Instrument-making plant)D.Kovalchuk�79/2Novosibirsk,630049RuSSIANFEDERATION Fax+7383226�594 prinsib@sol.ru; www.npzoptics.com
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Page
General instructions..............................4 Technical specifications..........................5 Inventory list ....................................6 Construction of the telescope......................8 Preparing telescope for observations................�� Assemblingthetelescope...........................�� Balancingthetelescope............................�2 Aligningthefinderscope............................13 Powersupplyandhandcontroller.....................14 Polaralignment...................................�5 Calibratingthesettingcircles........................�7 Observations....................................�8 Visualobservations................................�8 Astrophotography.................................�9 Maintenance....................................20 Collimation (alignment) of the optics ................2� Storage.........................................22 Acceptance certificate ............................23 AppendixA:Brighteststarsvisible intheNorthernHemisphere...............24
Due to continuous product improvements, specifications aresubjecttochangewithoutnotice.
Table Of CONTeNTS
GeNeral INSTruCTIONS
Warning!Never observe the Sun directly through your telescope or its finder scope - permanent eye damage could result.Do not let children hold observations through telescope without adult’s control.
The telescope is designed for visual observations of celestialobjects and for astronomical photography. It requires carefultreatmentandsomeknowledgeofastronomy.Onlyinthiscasetheuseoftelescopewillbringsatisfactiontoitsowner.Thetelescopemaybeusedatanambienttemperaturerangingfrom30°to-30°C.Whenbuying the telescope inspect thepackagetomakesurethat theoriginalpackaging is ingoodcondition,andsealsarenotbrokenormissing.Havingopenedthepackage,checkthepresenceofallcomponentsdescribedininventorylist.Readinstructionmanualfirstbeforeusingthetelescope.
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Specification
aperture, mm
focal length, mm
focal ratio
Telescope magnification, x
resolving power
limiting visual magnitude
Finderscope magnification, x
finderscope aperture, mm
focuser
right ascension turning angle
Declination turning angle
latitude adjustment range
Input voltage V aC
frequency, Hz
Power, Watts
Output voltage, V
Dimensions, mm:
OTa* length
Telescope height
OTa weight, kg
Telescope weight, kg
�25
��25
1:9
45;�80;
�"
�2,0m
630
�,25";2"
360о(24ч)±90о
0...70о
220
50
5
�2DC
�250�500
6,0
25
�00
�000
1:10
40;�60;
�,3"
��,2m
630
�,25";2"
360о(24ч)±90о
0...70о
220
50
5
�2DC
�080
�450
4,3
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Tal-100rS Tal-125r
*OpticalTubeAssembly
TeCHNICal SPeCIfICaTIONS
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INVeNTOry lIST
Component
Telescopefinderscope:
6Xx30Polar axis finderscope 6xx23equatorial mountMT-3S (MT-3S-2D):
withcounterweight2.2kgwithcounterweight3.7kg
Tripod:woodenmetal
Power supply Hand controllerPower cord (10 m)Spare parts and accessories:Plossleyepiecef’=6.3mmPlossleyepiecef’=25mmReticleT-adapterM42x0.75
Instruction manualOptional accessories:Pier:C75(1000mm)C110(800mm)
Plossleyepieces(1.25’’):f’=7.5mmf’=12.5mmf’=17mmf’=20mmf’=32mmf’=40mm
Superwideangleeyepieces(1.25’’):f’=10mm(60°)f’=15mm(65°)f’=20mm(65°)
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++
-+
-++++
+++++
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+-
-++++
+++++
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Tal-100rS Tal-125r
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Ultrawideangleeyepieces(80°):f’=15mm(1.25’’)f’=20mm(2’’)f’=24mm(2’’)f’=25mm(2’’)
Directobservationlens:PP-45°(1.25”)PP-45°(2”)2xBarlowlens3xBarlowlensGuideeyepieces12.5mm(1.25’’)Off-axisguider(2’’)ColorfiltersM28.5x0.6:
blackneutralyellowblueredgreen
ColorfiltersM48x0.75:blackneutralyellowblueredgreen
Powercordextensioncablewithcaradapter(10m)
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Component Tal-100rS Tal-125r
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CONSTruCTION Of THe TeleSCOPe
The telescope consists of threemainparts:optical tubeassembly(OTA) (1), German equatorialmount(2),apierortripod(3).
The optical tube isabasiccomponentofthetelescope.Itincludesallmainopticalunitssuchasaprimarymirror,acorrectorandaneyepieceunitwithfocusingmechanism.
A Refractor Telescope: parallelbeamofraysentersthetubeofthetelescopeandisprojectedatthefocalplaneof theeyepiece (2)with thehelpofachromaticeyepiece(1).Forcomfortobservationseyepieceunitisinclinedon90°relativelytotheopticalaxisofthetelescopewithhelpofflatdiagonalmirror(3).Astandardsetincludestwoeyepie-cesandaBarlowlens,whichallowobserving celestial objects withvariousrateofmagnification.TheOTA suppliedwith a finder-scope,makessearchingforceles-tialobjectseasier.Mirrors’ effective areas are cove-redwith high reflectionaluminumcoatingswithprotectivelevel.
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All lenses surfaces are coveredwithantireflectingcoating.The eyepiece unit includes afocuserwithaneyepiecetube.Focuseroffrictionaltypeconsistsofanaxiswithhandwheels(1)forshiftinganeyepiecetube.Smoothnessofaneyepiecemotionisregulatedwithascrew(2).Screw(3)fixesaneyepiecetubeintheadjustedposition.
The equatorial mount isdesignedfor pointing the telescope at thecelestial objects and tracking theirmovement.MT-3S mount consists of twoperpendicular axes: the polar axisandtheaxisofdeclination.ThereisamountingplatewithOTAringsonthetoppointofthedeclinationaxis,andacounterweightshaftwithcounter-weightsontheotherside.Themount headhas a clock driveembedded,which enables trackingofcelestialobjectswithuserdefinedspeed.Thespeedissetbyahandcontrollerandhas three tracking rates: solar,lunarandstellar,aswellastwoadditi-onalcorrectionspeeds-accelerationanddecelerationat50%.Handcon-trollerhasanightlightlamp.
�0
Forthefirstsight-inontheobject,loosen the telescope’sDec. andR.A.locks(1)andmovetheteles-copetocenteranobjectinthefieldofview.The fine alignment is done bymanualDec.slow-motioncontrols(2) onDec. axis, andR.A. slow-motioncontrols(3)embeddedintotheclockdrive.Thepolaraxishasembeddedpolaraxisfinderscope(optional)(4)andisfixedinatripod(pier)mountingheadwithalatitudedial.
The pier servesforholdinganequa-torialmountwithanOTA.Itconsistsofthetubeandthreeattachablelegs.The tripod canbebetterusedonaruggedterrain.
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aSSeMblING THe TeleSCOPe
Takeatripodoutof thepackage.Place the pier on a firm plainsurface. Regulate the neededheight with help of pullout legs,whicharefixedbyknobs(1).Thepin (2) should be oriented to theNorth.Thetripodisequippedwithanaccessoryshelf(3)forcomfortobservation.
Taketheequatorialmountoutofthepackageandplaceitonthetopofthetripod.Checkthepin(1)tobebetweentwoazimuthadjustmentknobs(2).Fixthemountonthetripodtightlywith help of knob (3).Make surethereisnowobblingofthemountonthetripod.
Threadthecounterweightshaft(2)intothebaseoftheDeclinationaxis(6)oftheequatorialmountandfixit with the lock-nut (5).Unscrewthe safety washer/knob (1) andslide thecounterweight (3) to themidpointonthecounterweightshaftandsecureitinplacewiththelockknob(4).Screwbackinthesafetywasher/knob(1).Fix the tube rings (7) on themountingand lay out theOTA intherings.
PreParING TeleSCOPe fOr ObSerVaTIONS
�2
Place the finderscopebracket (1)inthewedgeslides.Fixthefinder-scopewithsixthumbscrews(2).
Placethepolaraxis inthehorizontalposition(0°onthelatitudedial),usingthewidthadjustmentmechanism(1)withtheloosenslow-motioncontrol(2).Enableunrestrictedmotionof thepolar axis, turning the handle (1)counterclock-wise.Slide the counterweights alongthe counterweight shaft until theycounterbalancetheOTA.Fixthepolaraxis.NowenableunrestrictedmotionoftheDec.axis,turningthehandle(2)counterclock-wise.FixthetubeandtheDec.axis.Repeatbalancingeachtimewhenplacing additional accessories onthetelescopictube,suchasphotoand video cameras, eyepieces,guidesandotherdevices,whichen-largetheweightoftheOTA.Keepinmindthatifthetelescopeisnotbalancedproperly, theclockdriveperiodicerrorwillincrease.
balaNCING THe TeleSCOPe
Toprovideasmoothmotionofthetelescopeandreliableoperationofequatorialmountdrives,thebalancingofthetelescopesisrequired.
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Place the crosshair (2) into theeyepiece f’=25mm (1) and theninsert theeyepieceinthefocusertube(3).Point the telescopeat thedistantobject (at least 400meters/yardsaway), and then center it in thetelescopic field of viewusing thereticle.FixtelescopeinthispositionwiththeR.A.andDec.locks.Now, looking through the finderscopeandusingthesixalignmentthumbscrews,centertheobjectontheintersectionofthecrosshairsofthefinderscope. In future,checkthe coalignment of the telescopeandthefinderscopepriortoobser-vations.
alIGNING THe fINDer SCOPe
Highmagnificationofthemaintelescopemakesitdifficulttofindarequiredcelestialobjectintheskybecauseofthesmallfieldofview.Thisiswhythetelescopeisequippedwithalow-powerfinderscopewithawidefieldofview.Thefinderscopemakesiteasiertolocatetheobjectyouwantandthentoobserveitinthefieldofviewofthetelescope.However,fortheproperuseofthefinderscope,itmustbealignedwiththemaintelescope,sothatboththefinderscopeandthetelescopepointatthesamepositioninthesky.
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Place the switch of the powersupplyinthe“0”position.Connect the power supply �2Voutputwiththemountsocketusingthepowercord.Plug in thepowersupply into the220/��0VACpoweroutlet.Placetheswitchofthepowersupplyinthe“l”position.TheLEDlightonthepowersupplyshouldturnon.Connecthandcontrollertothemountwiththespecialcutoffpoint(1).
Pressoneofthespeedbuttons(1)to start the clock drive.The LEDlightonthehandcontrollershouldturnon(2).Pushthesamebuttonagaintostoptheclockdrive.Press one of the two speedcorrection buttons (3)while clockdriveisworking,ifnecessary.TheLED light on the hand controllershould blink (2) while button ispresseddown.
POWer SuPPly aND HaND CONTrOller
Warning!always connect power supply to the mount using the power cord with power supply disconnected from the power outlet. use only original manufacturer’s power supply fuse or analogue (consult your dealer). always disconnect all the power, if replacing the power supply fuse.
�5
If the telescope is used in theSouthernhemisphere,thedirectionoftheclockdriverotationmustbechanged.This isdonewithhelpofswitcherinsidethehandcontroller.Open the hand controller coverand place the inside switchwith«N/S» (North/South)markings intherequiredposition.
Releasethelatitudelock(1).Usinglatitudeadjustmentknob(2),moveR.A.axisupordowninordertosetthe latitude of your location (seelatitudedial).Re-tightenthelatitudelock(1).
POlar alIGNMeNT
DuetotheEarth’srotation,celestialobjectsmoveinthetelescopefieldofview(thehigher telescopemagnification- thefaster thosemovementsappear).Polaralignmentofthetelescopeallowsmorecomfortableobservations,becauseyoucanfollowobjectsbymovingthetelescopeaboutoneaxis,thepolaraxis(orRightAscension(R.A.)axis),whichisinparallelwiththeEarth’saxis.
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ForvisualobservationspointtheR.A.(polar)axisofthetelescopetowardsPolaris(αUMi).Seethepicture.With this level of point ingaccuracy, very little use of theDec.slow-motioncontrolisnece-ssary for celestial objects tra-cking.Lesscorrectionisrequired,when polar alignment is donemoreprecisely.
moreprecisepolaralignmentisrequiredforastrophotography.MT-3S mount equipped witha polar axis finder scope (1),for precise polar alignment,with a reticle illumination.Thereticle also hasmajor stars ofthe ursa minor constellation,includingPolaris,depictedfortheNorthernhemi-sphere,andstarsoftheOctansconstellationforthesouthernhemisphere.Match stars depicted on thereticlewith thecelestialobjectsinthesky,usingazimuth(2)andlatitude (3) adjustment knobsandrotatingthepolaraxisfinderscopearounditsaxis.
ursamajor
Axisofdec-
linations
Polaraxis
Polaris
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Level the Dec. axis (put it in thehorizontalposition)andbyrotatingR.A. setting circle put it in a «0»(zero)position(seepicture).
FortheDec.settingcirclecalibrationfindabrightstarfromthestaratlas,and bring selected object to thecenterofthetelescopicfieldofview.RotatingDec.settingcircle(1),settheDeclinationofthestarobserved.CorrectDec.settingcirclecalibra-tionbyselectingnextstar.
CalIbraTING THe SeTTING CIrCleS
R.A.andDec.axeshavesettingcircles,whichenableobservertolocateanobjectintheskybyitscelestialcoordinates–rightascension(R.A.)andDeclination(Dec.).Calibration of setting circles is done after polar alignment of thetelescope.
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ObSerVaTIONS
Pointthetelescopeatanychosenobject, and do some coarseadjustments toput it in thefinderscopefieldofview.Thencentertheobject usingslowmotioncontrols–firstinthefinderscopeandthenin the main telescope field ofview,whenobservingthroughtheeyepiece.
Use focus knobs to focus,whenchangingeyepieces.Provided eyepieces give severalmagnif icat ion options for anobserver.
VISual ObSerVaTIONS
Whenusinghighermagnificationnotonlythevisibleimagesizeappearslargerinthetelescope,butalsoblurringanddistortionoftheimage,startwinkle,causedbyatmospherebecomemoresignificant.Pleasenotethatsomenightscouldhavebadobservationconditionsbecauseoftheatmosphericturbulence.EvenobservingfineMoonsurfacedetailscanbedifficult.Avoidobservationsthroughawindow,becauseofthewindowglassaberrations,andtemperaturedifferencesbetweeninsideandoutsideair,whichwillcauseimagestolookblurredanddistorted.Putasoftcoveronthetelescopeanditspowersupplyafterobserva-tions,ortoprotectitfromrain/snow.
Tal-100rSPlosslf'=25mm Plosslf'=6.3mm
40x �60x
Tal-125rPlosslf'=25mm Plosslf'=6.3mm
45x �80x
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Tomountthecameraontheteles-cope, take themirror (1) and acamera adapter (2) away andunscrewthecameraobjective.
Screwthecameraadapterintothefocuserdrawtube.
AttachtheT-ring(T-adapter)tothecameraandthreaditontotheca-meraadapter.
Preciseguidingcanbedonewithanoff-axisguideroraguide-telescope(soldseparately).
Use slowmotion controls andbuttonsofhandcontrollertoavoidshiftingofthestarfromthereticle.
To minimize such adjustmentsandforbetterphotographyqualitymore precise polar alignment isrequired.
aSTrOPHOTOGraPHy
Astrophotography is executedwith compact reflex camerawithobjective threadM42x1 (M42x0.75 threadcameraadapter isalsosuppliedwiththetelescope).
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Inordertokeeptelescopeingoodoperatingconditiononeshouldprovidegoodcareandmaintenancefortheinstrument.Pleasenotethat lensormirror surfaces shouldbe cleanedas infrequently aspossible,onlywhenabsolutelynecessary.
Optics self-cleaning only permitted after expiration of manufac-turer limited warranty!
Keeptelescopecleanandprotectitfromanyphysicaldamage.
Useaclean,softclothtoremovedustfromallmetallicsurfaces.Thenwipethemwithaclothwettedinacid-freevaselineanddrywithanapkin.
Wipetheobjectiveandeyepiecelensesbydrylinennapkin.Greasespotsremovebycottoncloth,wettedwiththepurespirit(alcohol).
Usethecottoncloth,wettedwiththepurespirit(alcohol),withoutpressuretocleanthesecondarymirrorsurface,havingremoveddustfromtheirsurfacesbysoftbrushfirsttoavoidsmallscratches.
Keepthedustcoveronthefrontofthetelescopeandtheendcaponthefocusertubewhennotinuse.
MaINTeNaNCe
2�
Set thePlossl f’=6.3mm into theOTA.
Point thetelescopetoanystarof4m-5mmagnitude.
Takeawaythecup(1)andsecurestardiffraction imagewithhelpoffourknobs.Stardiffraction imageshouldhaveroundkernelandnotmorethan2roundrings. Breaksand kernel form change are notallowed.Effectivenessreductionwithinfirstdiffractionringisallowedonly.
Iftheweatherdoesnotallowgettingthe clear diffraction imageof thestar,maketheadjustmentorientingon slightly out-of-focus image,but the energy should be spreadequallyaroundthekernel.Such operations require certainskillsandqualifications.
COllIMaTION (alIGNMeNT) Of THe OPTICS
Incaseofaccidentalmirrorsmisalignmentoraftercleaningopticalparts,telescopecollimationmightbenecessary.
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STOraGe
The telescopemust be kept in a clean, dry (humiditymust notexceed80%),dust-freeplacewithanambienttemperaturebetween+5°and+40°C.
Avoidcollisionandshakingofthetelescope.
It isprohibited tostoreacids,alkalis,andanychemicallyactivesubstances,whichmayproduceevolvedgasorvaporharmfulfortheoptics,atthesameplacewiththetelescope.
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Telescope____________,serial#___________
Equatorialmount,serial#_____________
Passedtheproductapprovalandfoundserviceable.
Manufacturingdate__________________
Signatures_____________________
aCCePTaNCe CerTIfICaTe
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Appendix A
brightest stars visible in the Northern Hemisphere
Star Constellation r. a.2000.0
Declination2000.0
Visiblemagnitude
AlpheratzmirachPolarisMirfakAldebaranRigelCapellaBetelgeuseSiriusCastorProcyonPolluxRegulusmerakDubhePhecdaAliothmizarSpicaAlcaidArcturusVegaAltairDeneb
αAndβAndαumiαPerαTauβOriαAurαOriαCmaαGemαCmiβGemαLeoβumaαumaγumaεumaζumaαVirη umaαBooαLyrαAqlαCyg
AndromedaAndromedaursaminorPerseusTaurusOrionAurigaOrionCanismajorGeminiCanismajorGeminiLeoursamajorursamajorursamajorursamajorursamajorVirgoursamajorBootesLyraAquilaCygnus
2.07m
2.07m
�.97m
�.79m
0.87m
0.�8m
0.08m
0.45m
-�.44m
�.58m
0.40m
�.�6m
�.36m
2.34m
�.8�m
2.4�m
�.76m
2.23m
0.98m
�.85m
-0.05m
0.03m
0.76m
�.25m
+29о05'+35о37'+89о15'+49о51'+�6о30'-8о12'
+45о59'+7о24'-�6о42'+3�о53'+5о13'
+28о01'+��о58'+56о22'+6�о45'+53о41'+55о57'+54о55'-��о09'+49о18'+�9о10'+38о47'+8о52'
+45о16'
0h08m
�h09m
2h3�m
3h24m
4h35m
5h�4m
5h�6m
5h55m
6h45m
7h34m
7h39m
7h45m
�0h08m
��h0�m
��h03m
��h53m
�2h54m
�3h23m
�3h25m
�3h47m
�4h�5m
�8h36m
�9h50m
20h4�m