NPZ TAL-150K User manual

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TAL TELESCOPES
TAL-150K
TAL-200K
TAL-250K
INSTRUCTION MANUAL

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Novosibirsk Instrument-making plant, FSUE PA
D. Kovalchuk 179/2 Novosibirsk,
630049 RUSSIAN FEDERATION
Fax [phone]
[email protected];
www.npzoptics.com

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Page
General instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Technical specications . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Inventory list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Construction of the telescope . . . . . . . . . . . . . . . . . . . . . .8
Preparing telescope for observations . . . . . . . . . . . . . . . 12
Assembling the telescope . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Balancing the telescope . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
 Aligningthenderscope............................14
 Powersupplyandhandcontroller.....................15
Polar alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Calibrating the setting circles . . . . . . . . . . . . . . . . . . . . . . . . 18
Observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Visual observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Astrophotography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Collimation (alignment) of the optics . . . . . . . . . . . . . . . . 24
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Acceptance certicate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
 AppendixA:Brighteststarsvisible
in the Northern Hemisphere . . . . . . . . . . . . .. . 28
Due to continuous product improvements, specications are
subject to change without notice.
TABLE OF CONTENTS

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GENERAL INSTRUCTIONS
Warning!
Never observe the Sun directly through your telescope or its
nder 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 celestial
objects and for astronomical photography. It requires careful
treatmentandsomeknowledgeofastronomy.Onlyinthiscase
theuseoftelescopewillbringsatisfactiontoitsowner.
Thetelescopemaybeusedatanambienttemperatureranging
from30°to-30°C.
When buying the telescope inspect the package to make sure
thatthe originalpackagingisingoodcondition,andsealsare
notbrokenormissing.Havingopenedthepackage,checkthe
presenceofallcomponentsdescribedininventorylist.
Readinstructionmanualrstbeforeusingthetelescope.
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250
2130
1:8.5
85; 170;
213; 426
0.5’’
14.0m
8
50
1.25’’; 2’’
360°
(24h)
±90°
0….70°
220
50
5
12 DC
660
1450
15.0
45
Specication TAL-150K TAL-200K
Aperture, mm
Focal length, mm
Focal ratio
Telescope magnication, x
Resolving power
Limiting visual magnitude
Finderscope magnication, 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
150
1550
1:10.3
62;124;
155;310
0.8’’
12.8m
6
30
1.25’’
360°
(24h)
±90°
0….70°
220
50
5
12 DC
425
1350
6.2
25
TAL-250K
200
1700
1:8.5
68; 136;
170; 340
0.6’’
13.4m
8
50
1.25’’
360°
(24h)
±90°
0…70°
220
50
5
12 DC
450
1400
8.5
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TECHNICAL SPECIFICATIONS
*Optical Tube Assembly

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INVENTORY LIST
Component
Telescope
Finderscope:
6Xx30
9Xx50
Polar axis nderscope 6xx23
Equatorial mount:
MT-3Swithcounterweights:
3.0 kg (1 unit)
3.0 kg (2 units)
4.5 kg (1 unit)
Pier with legs:
C75 (800 mm)
C110 (770 mm)
Power supply
Hand controller
Power cord (10 m)
Spare parts and accessories:
Plossleyepiecef’=10mm
Plossleyepiecef’=25mm
2x Barlow lens
Reticle
Plugforphotographing
T-adapterM42x0.75
Instruction manual
Optional accessories:
Equatorial mount:
MT-3S-2Dwithcounterweights:
3.0 kg (1 unit)
3.0 kg (2 units)
4.5 kg (1 unit)
Tripod
Plossleyepieces(1.25’’):
f’=6.3mm
f’=7.5mm
f’=12.5mm
f’=17mm
f’=20mm
f’=32mm
f’=40mm
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TAL-150K TAL-200K TAL-250K
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Superwideangleeyepieces(1.25’’):
f’=10mm(60°)
f’=15mm(65°)
f’=20mm(65°)
Ultrawideangleeyepieces(80°):
f’=15mm(1.25’’)
f’=20mm(2’’)
f’=24mm(2’’)
f’=25mm(2’’)
3x Barlow lens
Guideeyepieces12.5mm(1.25’’)
Off-axisguider(2’’)
ColorltersM28.5x0.6:
black
neutral
yellow
blue
red
green
ColorltersM48x0.75:
black
neutral
yellow
blue
red
green
Plug 1.25’’
Plug 2’’
Powercordextension
cablewithcaradapter(10m)
Component
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TAL-150K TAL-200K TAL-250K
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CONSTRUCTION OF THE TELESCOPE
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The telescope consists of three
mainparts:opticaltubeassembly
(OTA)(1),germanequatorialmount
(2),apierortripod(3).
The optical tube is a basic component
ofthetelescope.Itincludesallmain
optical units such as a primary mirror,
acorrectorandaneyepieceunitwith
focusingmechanism.
ACatadioptricTelescope(Klevtsov
System):beamsofrays,reected
from the primary mirror (1), pass
through the corrector lenses (2)
and(3)andhavingreectedfrom
thesmoothsurfaceofthelens(3),
gobackthroughcorrector,forming
theobject’simageatthefocalplane
oftheeyepiece(4).
Forcomfortobservationsofcelestial
objects close to zenith, eyepiece
unitisinclinedon90°relativelyto
theopticalaxisofthetelescopewith
helpofatdiagonalmirror(5).
A standard set includes two
eyepiecesandaBarlowlens,which
allow observing celestial objects
withvariousrateofmagnication.
The OTA supplied with a nder-
scope,makessearchingforceles-
tial objects easier.
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Mirrors’ effective areas are
covered with high reflection
aluminum coatings with protective
level.
Alllensessurfacesarecovered
withantireectingcoating.
The eyepiece unit includes a
focuserwithaneyepiecetube.
Focuser consists of rack and
pinion.Thepinionaxishasfocus
knobs, which help move the
eyepiecetubeinordertofocus
telescope.
To provide the smoothness
of TAL-150K and TAL-200K
telescopes focusers, hold the
leftfocusknob(1)withonehand
andturntherightfocusknob(2)
clockwise(withalittleeffort)with
otherhand.
Fix the position of the focuser,
if necessary, using the same
procedure.
The lens-focusing mechanism
of TAL-200K and TAL-250K
hasfriction-type.Itincludesthe
axiswith the handweel (1)with
the help of which moves the
eyepiece tube. The smoothness
ofthe tube isadjusted with the
helpofthescrew(2).Thescrew
(3) is used to x the eyepiece
tube in a chosen position.
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The equatorial mount is designed
for pointing the telescope at the
celestial objects and tracking their
movement.
MT-3S (MT-3S-2D)mountconsistsof
twoaxessquarewitheachother:the
polaraxisandtheaxisofdeclination.
There is a mounting plate with OTA
ringsonthetoppointofthedeclination
axis,andacounter-weightshaftwith
counter-weightsontheotherside.
Itispossibletoplacealltypesofthe
mountsonapierortripod.
The mount head has a clock drive
embedded, which enables tracking
ofcelestialobjectswithuserdened
speed.
Thespeedissetbyahandcontroller
andhasthreetrackingrates:solar,
lunar and stellar, as well as two
additionalcorrectionspeeds-acce-
leration and deceleration at 50%.
Hand controller has a night light
lamp.
Fortherstsight-inontheobject,
loosen the telescope’s Dec. and
R.A.locks(2)andmovethe
telescope to center an object in the
eldofview.
Thenealignmentisdonebymanual
Dec. slow-motion controls (2) on
Dec. axis, and R.A. slow-motion
controls (3) embedded into the
clockdrive.
Thepolaraxishasembeddedpolar
axisnderscope(optional)(5)and
isxedinatripod(pier)mounting
headwithalatitudedial.
Mount MT-3S-2D has a
drive according to the axis of
declination.
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