NPZ TAL-200K User manual


TELESCOPE TAЛ-200K
Service manual

2
CONTENTS
Page
. General directions 3
2. Specifications 4
3. Standard equipment 5
4. Design and principle 8
5. Optical train 3
6. Preparation for operation 6
6.. Telescope assembling 6
6.2. Telescope balancing 6
6.3. Precautionary measures 7
7. Order of operation 9
7.. Operation with telescope 9
7.2. Photographic observations 2
7.3. Telescope and atmospheric conditions 22
8. Maintenance 23
9. Rules of storage 24
0. Acceptance certificate 24
Supplement. Table of close stellar pairs for testing
image quality of the telescope 25
The telescope is subject to continuous development and improvement,
consequently it may incorporate minor changes in detail from the information
contained herein.
03.04

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1. GENERAL DIRECTIONS
ATTENTION!
Telescope TAЛ-200K (hereinafter in the text referred to as «telescope») is
not intended for direct visual observation of Sun at full operating aperture.
Because of high light intensity an image of Sun in focus of primary mirror has a
high temperature. To avoid on overheating of corrector it is recommended to
avoid any direct observation of Sun disk.
One should remember that overheated corrector being in field of direct sunlight
can be out of order or make a turbulent air torrents in telescope tube that to reduce
considerably a quality of image.
Also if it is necessary to leave a telescope out of door (for example, to dry it) one
should orient it so that the direct sunlight do not get into the optical system.
The telescope can operate normally at the ambient temperature from 30°C
to minus 30°C.
It is a precise powerful amateur astronomer telescope. It demands a careful
handling and certain knowledge in the field of astronomy. Only in this case user
will be fully satisfied.
When buying the telescope one should pay attention to the package safety
ensured by the seal of the manufacturing plant. After unsealing the case one
should check compliance of the complete set denoted in the list of enclosure.
Prior to using the telescope one gets acquainted with its handling and order of
operation.

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2. SPECIFICATIONS
Diameter of objective lens (operating aperture), mm 200
Focal length, mm 2000
Relative aperture :0
Magnification and angle field of view (changeable):
- with the eyepiece f’=25 mm 80x 3.3′
- with the eyepiece f’=0 mm 200x 2.5′
- with the eyepiece f’=25 mm and Barlow lens 60x 5.4′
- with the eyepiece f’=0 mm and Barlow lens 400x 6.3′
Photographic angle field of view 40′ (23.3mm)
Screening of pupil in center 2%
Resolution limit 0.6″
Pellucid capacity 3.4m
Rotation of the telescope:
in right ascension (hour-long angle) 360° (24h)
in declination 360°
Operation limit by latitude 0°-70°
Angular field of view of the finderscope 7°
Magnification of the finderscope 8x
Voltage of the supplying mains, V 220(0V)±0%
Current frequency 50Hz (60Hz)
Output voltage of the supply unit, V 2
Size of the telescope, mm:
length tube 550
height 320
Weight of the telescope, Kg 30

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3. STANDARD EQUIPMENT
Name Qty
Telescope 
Supply unit 
Eyepiece of f’=25mm 
Finderscope 
Equatorial mounting 
Supports 3*
Tripod *
Pier *
Bundled conductors 
Higned clips 2
Control panel **
Cable for car mains **
Accessories and Parts
Eyepiece of f’=0 mm 
Barlow lens 
Reticle 
Black light filter (solar) 
Neutral light filter (gray, lunar) 
Blind 
Bushing 
Adapter 
Stopper 
Fuse link ВПT9-0.6А (220V) 
Fuse link ВПT9-0.32A (0V) 
Housing 
Service manual 
* Telescope can be completed with a metal pier or tripod
** Optional accessories

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Fig.. General view:
 - telescope tube; 2 - equatorial mounting; 3 - pier; 4 - supports;
5 - supply unit; 6 - bundled conductor; 7 - control panel;
8 - eyepiece set; 9 - finderscope

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Fig. 2. General view of telescope mounted on tripod:
,2 - stoppers; 3 - table

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4. DESIGN AND PRINCIPLE
The telescope (fig., 2) consists of three basic units such as the telescope tube,
equatorial mounting, pier with supports or tripod and supply unit.
The tube 1 (fig.) is the basic part of the telescope, which embodies the optical
units such as a primary mirror, corrector, eyepiece set and finderscope.
The primary mirror 1 (fig. 3) is fastened with the bushing 2 in the center
hole. The blending tube 3 on the collet bushing prevents stray light. The mirror
is adjustable on ball hinge by means of the six screws 4.
Fig. 3. Assemble of primary mirror together with eyepiece set:
 - mirror; 2 - bushing; 3 - blending tube; 4 - screws;
5 - bushing; 6 - focusing mechanism; 7 - diagonal mirror;
8 - eyepiece; 9 - screw; 0 - back flange;  - screw

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The corrector (fig.4) consists of secondary mirror 2 and meniscus lens
3 spaced by means of padding rings 4 in the mounting . The corrector
is adjustable on the ball hinge 5,6 by means of adjusting screws 7. The
Fig. 4. Corrector:
 - mounting; 2 - reflecting lens; 3 - meniscus; 4 - padding ring;
5 - hinge bushing; 6 - hinge ped; 7 - screw; 8 - cap

0
Fig. 5. Equatorial mounting:
 - polar axis; 2 - handle; 3 - bracket with scale of lalitudes;
4 - watch drive; 5 - handwheel of slow-mothion mechanism;
6 - circle of hour angles; 7 - bracket; 8 - screw of axis brake;
9 - declination axis; 0 - circle of declinations;
 - counterweights
corrector assembly is mounted in the telescope tube.
Eyepiece set (fig.3) consists of focussing mechanism, diagonal mirror, set of
symmetrical eyepieces f'=25mm and f'=0mm fixed in the mounting of 3.8mm
(.25”), Barlow lens mounted in the same one.
Finderscope 9 (fig.) is a telescope with 8x magnification and view field 7°.
The equatorial mounting (fig.5) consists of polar axes  and declination axis 8
perpendicular to the polar axis.