NPZ TAL-1T User manual

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AMATEUR ASTRONOMER
TELESCOPE ÒÀË -1(TÀË-1Ò)
SERVICE MANUAL

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CONTENTS
Page
1. General directions 3
2. Specifications 4
3. Delivery set 5
4. Design of telescope 6
4.1. Design and principle of operation 6
4.2. Optical train 12
5. Preparation for operation 15
5.1. Telescope assembling 15
5.2. Telescope balancing 15
6. Order of operation 17
6.1. Operation with telescope 17
6.2. Photographic observations 19
6.3. Telescope and atmospheric conditions 20
7. Maintenance 21
8. Possible derangements and methods of their
elimination 22
9. Rules of storage 24
10. Acceptance certificate 25
Supplement. Table of close stellar pairs for testing
image quality of telescope 26
The instrument is subject to continuous development
and improvement, consequently it may incorporate minor
changes in detail from the information contained herein.
12.01

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ATTENTION!
The telescope forms the inverted image like any
astronomical instrument does.
The direct observations of the Sun through the
black light filter are permitted only with the use of
the solar diaphragm.
1. GENERAL DIRECTIONS
The telescope is designed for visual observation of the
celestial objects.
The telescope can operate normally at the ambient temperature from
30°C to minus 30°C.
When buying the telescope one should pay attention to the pack-
age safety ensured by the seal of the manufacturing pliant.
After unsealing the case one should check compliance of the com-
plete set denoted in the list of enclosure. Prior to using the telescope
one gets acquainted with its handling and order off operation.

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2. SPECIFICATIONS
Diameter of primary mirror, mm 110
Primary mirror focal ratio f /7.3
Focal length, 805mm
Magnifications:
-with the eyepiece of f'=25 mm 32x
-with the eyepiece of f'=10 mm 64x
-with the eyepiece of f'=25 mm and Barlow lens 82x
-with the eyepiece of f'=10 mm and Barlow lens 165x
Angular view field of the telescope at magnification:
32x1°29'
64x0°43'
82x0°33'
165x0°16'
Resolution 1.3''
Limiting magnitude 12m
Range of slow-motion control relative to the axes ±4°
Angle of rotation of the telescope in right ascension 360°(24 h)
in declination 360°
Range of setting by latitude 0°-70°
Angular view field of the finder scope 8°
Visible magnification of the finderscope 6x
Minimum distance of observation »65 m
Overall dimensions of the telescope:
length tube 850 mm
height in the operating position 1.650 mm
Mass of the telescope, maximum 20kg

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3. DELIVERY SET
The composition of the telescope and
its delivery set are shown in the table.
Name Qty
Telescope 1
Finderscope 6x1
Eyepiece of f=25 mm 1
Equatorial mounting 1
Support 3*
Pier 1*
Tripod 1*
Hinget clips 2
Accessories and Parts
Eyepiece of f=10 mm 1
Barlow lens 1
Retiñle 1
Yellow light, filter 1
Black light filter (solar) 1
Blue light filter 1
Red light filter 1
Green light filter 1
Neutral (grey, lunar) light filter 1
Blind 1
Bracket 1
Stopper 1
Cap-diaphragm 1
Screwdriver 1
Napkin 1
Screen (for observation of the Sun) 1
Brush 1
Shipping Container
Shipping case 1
Service Documents
Service manual
* The telescope can be completed with a metal pier (TÀË-1) or tripod
(ÒÀË-1Ò)
Table

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4. DESIGN OF TELESCOPE
4.1. Design and principle of operation
The telescope consists of three basic units: the telescope tube,
equatorial mounting and pier with supports.
The tube I (fig. 1) is the basic part of the telescope which embodies
the optical parts: the primary mirror, diagonal mirror, finderscope 3 fixed
in the locating rings 2, eyepieces and Barlow lens which are inserted
In the focusing mechanism 4.
The primary mirror (fig. 3) is mounted in the cell and can be adjusted
by means of the screws I and 2.
The diagonal mirror (fig. 4) is cemented to the cell and fixed in the
telescope tube by means of a spider.
The inlet hole of the tube is covered with the cap 3 (fig.5) after
operation.
The focusing mechanism 4 (fig. 1) is composed of a rack and pinion.
The pinion axle carries the handwheels which help to move the eyepiece
tube. The smoothness of the tube movement can be controlled. For this
purpose the left handwheel is held by one hand and the right handwheel
is rotated clockwise with some effort relative to the left handwheel by
the other hand. The chosen position of the tube can be fixed by the
denoted method if necessary.

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Fig. 1
General view of telescope with metal pier
1
2
3
4
5
6
7

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Fig. 2
General view of telescope with trepod
3
2
1

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The finderscope 3 is the telescope with the magnification of 6 X and
viewfield of 8°.
The equatorial mounting (fig. 6) consists of two axes - the polar axis
2 and the declination axis 6 perpendicular to it.
Fastened on one end of the declination axis is the saddle with the
hinged clips 4 in which the telescope tube is mounted; fastened on the
other end of the axis is the counterweight 8 which can travel on thread
for balancing the telescope. The screen 1 (fig. 5) and the bracket for the
camera 4 can be fastened on the same axis.
The casing of the polar axis is fastened on the bracket 10 with the
scale of latitudes (fig. 6) by means of which the whole system is set to
the latitude of the observers site.
Each axis has a circle which shows an hour angle or declination of
the object visible in the telescope viewfield. The position circle 7 on
the declination axis which shows the declination of the objects fig-
ured from 0 to 90° with a division value of 2°. The circle I on the polar
axis (the circle lot hour angles) is figured from 0 to 24 hours with a
division value of 10 minutes.
The coarse focusing of the telescope tube, relative to both axes is
performed by slackening the clamping screws 3 and by rotation of the
tube relative to the respective axis with the further clamping of the
1
Fig. 3
Primary mirror
Fig. 4
Diagonal mirror
2
1
2

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Fig. 5. Tools and accessories:
1 - solar screen; 2 - cap-diaphragm; 3 - cap; 4 - holder for camera; 5 - Barlow lens; 6 - eyepiece;
7 - light filtes; 8 - screwdriver; 9 - napkin; 10 - blind; 11 - reticle
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