NPZ TAL-150K User manual

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TELESCOPE TAË-150K
Service manual

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CONTENTS
Page
1. General directions 3
2. Specifications 4
3. Standard equipment 5
4. Design and principle 8
5. Optical train 12
6. Preparation for operation 15
6.1. Telescope assembling 15
6.2. Telescope balancing 15
6.3. Precautionary measures 16
7. Order of operation 18
7.1. Operation with telescope 18
7.2. Photographic observations 19
7.3. Telescope and atmospheric conditions 19
8. Maintenance 20
9. Rules of storage 22
10. Acceptance certificate 22
Supplement. Table of close stellar pairs for testing
image quality of the telescope 23
The telescope is subject to continuous development and improvement,
consequently it may incorporate minor changes in detail from the information
contained herein.
11.01

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1. GENERAL DIRECTIONS
ATTENTION!
Telescope TAË-150K (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 150
Focal length, mm 1551
Relative aperture 1:10.3
Magnification and angle field of view (changeable):
- with the eyepiece f=25 mm 61x
41.5¢
- with the eyepiece f=10 mm 125x
20¢
- with the eyepiece f=25 mm and Barlow lens 158x
16¢
- with the eyepiece f=10 mm and Barlow lens 321x
8¢
Photographic angle field of view 40¢
(23.3mm)
Screening of pupil in center 13%
Resolution limit 0.8²
Pellucid capacity 13.4m
Range of slow-motion control on the axes within ±4°
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 8°
Magnification of the finderscope 6x
Voltage of the supplying mains, V 220(110V)±10%
Current frequency 50Hz (60Hz)
Output voltage of the supply unit, V 12
Size of the telescope, mm:
length tube 425
height 1130
Weight of the telescope, Kg 23

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3. STANDARD EQUIPMENT
Name Qty
Telescope 1
Supply unit 1
Eyepiece of f=25mm 1
Finderscope 1
Equatorial mounting 1
Supports 3*
Tripod 1*
Pier 1*
Car mains bundled conductors 1
Control console 1
Accessories and Parts
Eyepiece of f=10 mm 1
Barlow lens 1
Reticle 1
Black light filter (solar) 1
Neutral light filter (gray, lunar) 1
Blind 1
Bushing 1
Adapter 1
Stopper 1
Screwdriver 1
Napkin 1
Fuse link ÂÏT19-0.16À (220V) 1
Fuse link ÂÏT19-0.32A (110V) 1
Brush N 6 1
Housing 1
Service manual 1
* Telescope can be completed with a metal pier or tripod

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Fig.1. General view:
1  telescope tube; 2  equatorial mounting; 3  control console; 4  cable
assembly; 5 supply unit; 6  support; 7  pier; 8  eyepiece unit; 9  finderscope
4
3
2
1
8
9
7
65

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Fig. 2. General view with tripod :
1,3 - stoppers; 2 - table
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1
2

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4. DESIGN AND PRINCIPLE
The telescope (fig.1, 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.1) 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 collet bushing 2 in the
center hole. The blending tube 3 on the collet bushing prevents stray light. The
Fig. 3. Assemble of primary mirror together with eyepiece set:
1 - mirror; 2 - bushing; 3 - blending tube; 4 - screws;
5 - bushing; 6 - focusing mechanism; 7 - diagonal mirror; 8 - eyepiece;
9 - screw; 10 - back flange; 11 - screw
1
23
11
10 8
9
7
65
4

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mirror is adjustable on ball hinge by means of the six screws 4.
The corrector (fig.4) consists of secondary mirror 2 and meniscus lens 3
spaced by means of padding rings 4 in the mounting 1. The corrector is
6
7
2
13
4
5
Fig. 4. Corrector:
1 - mounting; 2 - reflecting lens; 3 - meniscus; 4 - padding ring;
5 - hinge bushing; 6 - hinge ped; 7 - adjusting bolt-screw; 8 - cap
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adjustable on the ball hinge 5,6 by means of adjusting screws 7. The
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'=10mm fixed in the mounting of 31.8mm
(1.25), Barlow lens mounted in the same one.
Finderscope 6 (fig.1) is a telescope with 8x magnification and view field 7°.
The equatorial mounting (fig.5) comprises the polar axis unit 5 and
declination axis unit 9 that are perpendicular each other. The declination axis
unit is provided with the bracket 7 for telescope tube on the one side and with
the movable counterweight 10 on the other side to adjust the telescope balance.
The pole finder 3 inside the polar axis unit is provided to align the mounting
with the polar axis. The polar axis unit is attached to the bracket 1 provided
with the latitude scale. The alignment to polar axis is ensured by means of
elevation gear 2 and direction gear 12.
The mounting is provided with the watch drive inside for automatic tracking
a celestial object at specified speed.
Each of axis units is provided with the setting circle 4, 8 to define the right
ascension and declination angles of an object viewed.
The buttons 2 of the control console (fig.7) select three tracking rate: they
are the celestial, solar and lunar speeds; and the buttons 3 can switch on two
adjustment mode which speed up or slow down the tracking with factor 2.
The control console is connected to the mounting by means of plug 5. The
control console is provided with the local lighting activated by the button 4.
Pier 3 (Fig. 1) consists of a pipe with three supports 4.
The tripod (Fig. 2) allows to adjust a height of telescope and to fix each leg
of tripod with the help of stops 1 and 2. It is completed with table 3.
Supply unit 7 (a step-down transformer) is designed for converting of voltage
supply mains 220V, 50 Hz (or 110V, 60Hz) in to the voltage supply 12V which
is necessary to supply a safe operation of telescope.