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8

Preparation for observations

Assembling of 

telescope

 

Mount the bracket of finder (1) onto 

the  telescope  tube  and  fix  it  with 

the  screws  (2).  Fix  the  finder  with 

a screw (3). 

For the period of observation take off 

the cover from the blend of telescope 

tube and from the eyepiece tube.

 

Telescope has high magnifications and 

consequently  –  small  fields  of  view. 

This complicates the search of objects 

in the sky, that is why the telescope is 

equipped with an optical finder with a 

wide field of view. With the help of the 

finder you can easily find the necessary 

object in the sky and then observe it in 

the field of view of the telescope.

For  this  purpose  you  should  adjust 

the  parallelism  of  the  optical  axes  of 

telescope tube and optical finder.

Direct  the  telescope  at  a  distant 

object,  inserting  an  eyepiece  into 

the eyepiece tube (eyepiece is not 

included into the set).

Set  the  image  of  chosen  object  in 

the centre of the field of view. Fix this 

position of the telescope. 

Adjustment of 

optical axes

Summary of Contents for TAL-125-5APO

Page 1: ...TELESCOPE TAL 125 5 SERVICE MANUAL...

Page 2: ...elescope 8 Adjustment of optical axes 8 Observations 10 Visual observations 10 Photographic observations 11 Maintenance 12 Telescope alignment 13 Storage 14 Acceptance certificate 15 Due to continuous...

Page 3: ...of 30 C to 30 C When buying a telescope pay you attention to the integrity of packaging which is provided with manufacturer s seals After opening the packaging check the complete set indicated in the...

Page 4: ...iameter mm 125 Focal length mm 940 Aperture ratio 1 7 5 Resolution limit 1 Limiting stellar magnitude 12 0m Finder visual magnification x 6 objective lens diameter mm 30 Focusing device 1 25 2 Tube le...

Page 5: ...actic mount 3S 2D with a counterweight of 3 7 kg Pole finder 6 23 Hand controller Power supply unit Metal tripod Cable 10 m Pier C75R 1000 mm Barlow Lens 2 Eyepieces 1 25 f 6 3 mm f 7 5 mm f 12 5 mm f...

Page 6: ...mm 1 25 f 20 mm 2 f 24 mm 2 f 25 mm 2 Prism for direct observation PP 45 1 25 Eyepiece guide 12 5 mm 1 25 Light filters 28 5 0 6 black neutral yellow blue red green Light filters 48 0 75 black neutral...

Page 7: ...focal plane of an eyepiece 4 For observation convenience the eyepiece assembly is inclined relatively to the telescope axis by 90 with the help of flat diagonal mirror 3 There is a finder integrated...

Page 8: ...he sky that is why the telescope is equipped with an optical finder with a wide field of view With the help of the finder you can easily find the necessary object in the sky and then observe it in the...

Page 9: ...finder s reticle by turning it in spherical joint of the bracket 1 and fix this position with the help of the screw 2 In future it will be enough just to check the coalignment of the optical axes of t...

Page 10: ...uch conditions Observations with the telescope through the window are meaningless as an uneven surface of window glass distorts images Cover the telescope when work is finished and to protect it again...

Page 11: ...ecting mirror 1 and bushing 2 unscrew the camera objective lens Screw a reducing bushing 2 in the camera Insert the camera 1 with a reducing bushing into the eyepiece tube 2 and secure them by the scr...

Page 12: ...ctive s and eyepiece s lenses with dry linen napkin To remove oil spots use a cotton wad wet with alcohol Conduct the cleaning of the diagonal mirror surface without pressure by cotton wad wet with et...

Page 13: ...additional alignment of the telescope can appear after optics cleaning or accidental misalignment The telescope alignment should be held by specialists as it requires special skills and qualification...

Page 14: ...eated place with a temperature range of 5 to 40 C and relative humidity up to 80 Avoid impacts and sharp shocks of telescope It is prohibited to store acids alkalis or any chemical materials emitting...

Page 15: ...______________ is fit for operation Date of issue ______________ 20 ___ Signatures _________________ Manufacturer Federal State Unitary Enterprise Production Amalgamation Novosibirsk Instrument Makin...

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