NPZ TAL -2 Manuel utilisateur
TELESCOPE ТАЛ -2 (ТАЛ-2Т)
SERVICE MANUAL
2
CONTENTS
Page
. General directions 3
2. Specifications 4
3. Standard equipment 5
4. Design and principle of operation of telescope 6
5. Preparation for operation 5
5.. Telescope assembling 5
5.2. Telescope balancing 6
5.3. Precautionary measures 6
6. Order of operation 9
6.. Operation with telescope 9
6.2. Photographic observations 2
6.3. Telescope and atmospheric conditions 22
7. Maintenance 23
8. Possible derangements and methods of their elimination 24
9. Rules of storage 26
0. Acceptance certificate 26
Supplement. Table of close stellar pairs for testing
image quality of the telescope 27
The telescope is subject to continuous development and improvement,
consequently it may incorporate minor changes in detail from the
information contained herein.
0.03
3
1. GENERAL DIRECTIONS
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
a solar diaphragm.
Telescope ТАЛ-2 (ТАЛ-2Т) (hereinafter in the text referred to as
"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
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.
4
2. SPECIFICATIONS
Diameter of primary mirror 50mm
Focal ratio f/8
Focal length 200mm
Magnifications:
-with the eyepiece of f'=40 mm 30x
-with the eyepiece of f'=25 mm 47x
-with the eyepiece of f'=7.5 mm 60x
-with the eyepiece of f'=40 mm and Barlow lens 95x
-with the use eyepiece of f'=25 mm and Barlow lens 58x
-with the eyepiece of f'=7.5 mm and Barlow lens 37x
Angular field of view of the telescope at magnification:
30x °2'
47x °
60x 0°29'
95x 0°29'
58x 0°7'
37x 0°8'
Resolution "
Limiting magnitude 2m
Range of slow-motion control on the declination axes ±4°
Rotation of the telescope:
in right ascension 360°(24h)
in declination 360°
Polar axis altitude adjustment 0° to 70°
Minimum distance of observation, mm 440
Voltage of the supplying mains 220/0±0°
Current frequency 50Hz (60Hz)
Output voltage of supply unit, V 2±0°
Angular field of view of the finderscope 7°
Magnification of the finderscope 8x
Sizes of the telescope:
length tube 200mm
height in the operating position 700mm
Weight of the telescope, maximum 40kg
5
3. STANDARD EQUIPMENT
Name Qty
Telescope
Supply unit
Eyepiece of f'=40 mm
Support 3*
Finderscope of 8x magnification
Pier *
Tripod *
Equatorial mounting
Bundled conductors
Bracket 2
Control panel **
Cable for car mains **
Accessories and Parts
Reticle
Barlow lens
Eyepiece of f'=25 mm
Eyepiece of f'=7.5 mm
Yellow light filter
Black light filter (solar)
Blue light filter
Red light filter
Green light filter
Neutral light filter (gray, lunar)
Blind
Fuse link ВПТ 9-0.6А (220V)
Fuse link ВПТ 9-0.32А (0V)
Cover
Adapter
Stopper
Cap
6
Name Qty
Screen (for observation of the Sun)
Market Containers
Housing
Housing
Service documents
Service manual
* Telescope can be completed with a metal pier (TAЛ-2) or
tripod (TAЛ-2T)
** Optional accessories
4. DESIGN AND PRINCIPLE
OF OPERATION OF TELESCOPE
The telescope consists of four basic units: the telescope tube, equatorial
mounting, pier with supports or tripod, supply unit.
The tube 5 (fig. ) is thebasic part of the telescope which embodies
the optical units: a primary mirror, a diagonal mirror, finderscope 3 fixed
in the locating rings 4, eyepieces and Barlow lens which are inserted in
focusing mechanism .
The primary mirror (fig. 3) is mounted in the cell and can be adjusted
by means of the screws 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 cap 3 (fig. 9) after operation.
Finderscope 3 (fig. ) is a scope with 8x magnification and field of
view of 7°.
The focusing mechanism 1 (fig. ) is composed of a rack and pinion.
The pinion axle carries the handwheels which help to move the eyepiece
7
- focusing mechanism; 2 - bushing; 3 - finderscope; 4 - ring;
5 - telescope tube; 6 - equatorial mounting; 7 - pier;
8 - bundled conductors; 9 - supply unit; 0 - cord; - supports;
2 - control panel
Fig. . General view of telescope with metal pier:
1
2
3
4
6
5
11
8
7
9
10
12
8
Fig. 2. General view of telescope with tripod:
,2 - stops; 3 - objects table
9
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 in this way,
if necessary.
Fig. 3. Primary mirror: Fig. 4. Diagonal mirror:
- set screw; 2 - adjusting - adjusting screw; 2 - set
screw screw
The telescope is complete with six light filters 6 (fig. 9)
The equatorial mounting (fig. 5) consists of polar axes 0 and
declination axis 3 perpendicular to the polar axis.
Fastened on one end of the declination axis is the saddle with hinged
clips in which the telescope tube is mounted; fastened on the other
end of the axis is the counterweights 5 which can move along the
axis for balancing the telescope tube. Solar-screen (fig. 9) can be
fastened on the same axis as well.
The casing of the polar axis is fastened on the bracket 7 (fig. 5) provided
with a scale of latitudes by which the polar axis is set to the latitude
of the observer’s site.
The southern (lower) end of the polar axis embodies electric clock drive 8,
the northern (upper) end embodies the casing of declination axis 3.
Both axises are provided whith a setting circles which shows an
hour angle or declination of the object visible in the telescope field of
view. Setting circle 4 on the declination axis which shows the object
0
1
2
12
11
3
4
5
10
9
8
6
7
Fig. 5. Equatorial Mounting:
- folding clips; 2 - micrometer screw of slow-motion mechanism;
3 - declination axis; 4 - circle of declinations; 5 - counterweights;
6 - bolt; 7 - bracket with scale of latitudes; 8 - electric watch drive;
9 - handwheel of micrometer screw of polar axis;
0 - polar axis; - circle of hour angles; 2 - screw of axis brake
Ce manuel convient aux modèles suivants
1
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