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TELESCOPE ТАЛ -2 (ТАЛ-2Т)

SERVICE MANUAL

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Summary of Contents for TAL -2

Page 1: ...TELESCOPE 2 2 SERVICE MANUAL...

Page 2: ...Operation with telescope 19 6 2 Photographic observations 21 6 3 Telescope and atmospheric conditions 22 7 Maintenance 23 8 Possible derangements and methods of their elimination 24 9 Rules of storage...

Page 3: ...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 att...

Page 4: ...cation 30x 1 12 47x 1 60x 0 29 95x 0 29 158x 0 17 317x 0 8 Resolution 1 Limiting magnitude 12m Range of slow motion control on the declination axes 4 Rotation of the telescope in right ascension 360 2...

Page 5: ...s 1 Bracket 2 Control panel 1 Cable for car mains 1 Accessories and Parts Reticle 1 Barlow lens 1 Eyepiece of f 25 mm 1 Eyepiece of f 7 5 mm 1 Yellow light filter 1 Black light filter solar 1 Blue lig...

Page 6: ...odies 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 1 The primarymirror fig 3 ismo...

Page 7: ...2 bushing 3 finderscope 4 ring 5 telescope tube 6 equatorial mounting 7 pier 8 bundled conductors 9 supply unit 10 cord 11 supports 12 control panel Fig 1 General view of telescope withmetal pier 1 2...

Page 8: ...Fig 2 General view of telescope withtripod 1 2 stops 3 objects table...

Page 9: ...e declination axis is the saddle with hinged clips 1 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 th...

Page 10: ...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 o...

Page 11: ...tripod with the help of stops 1 and 2 Supply unit 9 fig 1 powers the watch drive tracking the celestial objects It is designed for 220 V 50 Hz 110V 60Hz mains and activated with the key If the contro...

Page 12: ...12 Fig 6 Control Panel 1 indicator 2 speed selection buttons 3 correction buttons 4 lighting button 5 plug...

Page 13: ...13 Fig 7 Optical train of telescope 1 primery mirror 2 eyepiece 3 diagonal mirror 4 finderscope...

Page 14: ...14 Fig 8 Diagram of setting Barlow lens Eyepiece Barlow lens Eyepiece Focusing mount Focusing mount...

Page 15: ...ps with the help of hinged screws The finderscope is mounted on the tube in two rings and fixed with six set screws available on the rings In transportation and storage a hole in the eyepiece tube is...

Page 16: ...e declination axis in the horizontal position Then it is necesary to slacken each of three screws 12 through cap 11 of the watch drive fig 10 Holding the axis by hand see to it whether the telescope i...

Page 17: ...Fig 9 Tools and accessories 1 solar screen 2 cap diaphragm 3 cap 4 Barlow lens 5 eyepieces 6 light filters 9 blind 10 reticle 11 adapter 17...

Page 18: ...18 Fig 10 Watchdrive 1 worm gear wheel 2 cap 3 screw 4 handwheel 5 screw 6 screw 7 motor 8 screw 9 worm with gear wheel 10 worm wheel 11 cap 12 screw 13 cover 1 2 3 4 5 6 7 8 9 10 11 12 13...

Page 19: ...othed wheel of the worm takes place and secure them with screws 8 Mount cap 13 on the casing The smoothness of rotation of toothed wheel 1 together with the toothed wheel of worm 9 is checked by rotat...

Page 20: ...n axis during operation of the watch mechanism it is required to set the telescope polar axis in parallel to the celestial axis In this case the northern upper end of the polar axis faces the celestia...

Page 21: ...ope one brings the star or the planet to the centre of the field of view of the telescope at maximum magnification After that one sets the declination of the required star against the index The circle...

Page 22: ...ial pole One should remember that if the polar axis is set incorrectly even in the case when the star image is kept on the cross hairs the images of the stars at the edges of the field of view appear...

Page 23: ...the screws which fix the cell to the tube Without removing the mirror from the cell the mirror surface is wetted considerably with pure medical alcohol with the help of a cotton wool tampon By using...

Page 24: ...y mirror The image of the diagonal mirror must be positioned precisely in the middle of the primary one The reflection of an observer s eye fig 11 must be seen at the centre of the diagonal mirror ref...

Page 25: ...clear that the telescope is misadjusted and its mirrors and reflections from them are not concentric Fig 11 Setting concentricity of mirrors 1 inner diameter of focusing mount 2 diagonal mirror 3 ref...

Page 26: ...o 40 C The impacts and sharp shaking should be avoided It is forbidden to store the telescope together with acids alkalies materials which liberate moisture or chemically active gases and vapours 10 A...

Page 27: ...2 Bootes Boo 14h 42 8m 27 17 2 7 5 1 3 0 Bootes Dra 17h 04 3m 54 32 5 8 5 8 2 2 Draco Oph 18h 00 4m 08 11 5 4 6 0 2 0 Ophiucus 70 Oph 18h 02 9m 02 31 4 0 6 0 2 4 Ophiucus 1 Lyr 18h 42 7m 39 37 5 1 6 2...

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