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Care and cleaning of Optics: 

 
WARNING:  Improper  cleaning  of  optical  components  may  void  the 
warranty! 
Optical  components  of  a  telescope  will  over  time  get  dirty.  The  amount  of 
dirt and or dust collected onto a lens or mirror should only be removed with 
the  utmost  care  and  this  is  at  times  best  left  to  people  with  experience  in 
this  procedure.  A  considerable  amount  of  dirt  or  dust  must  be  present  on 
the optical surface before one will notice the effect visually.  
 
1.  Keeping  the  dust  caps  during  storage  of  the  telescope  will  reduce  the 
amount of dust collected.  
 
2. After using the telescope there might be dew condensation on the optical 
surfaces. When the telesecope is brought inside remove the dust caps und 
allow the moisture to evaporate naturally. Point the telescope downwards so 
as to minimize the collection of airborne dust.  
 
3. Once the moisture is gone then replace the dust caps.  
 
4. If you wish to remove dust from the lenses or mirrors you first should try 
using  a  can  of  filtered  compressed  air.  Remove  the  dust  cap  and  the  dew 
shield  in  the  case  of  the  refractor  style  of  telescope,  or  take  the  mirror  cell 
out  of  the  reflecting  type.  Once  you  are  able  to  freely  blow  across  the 
surface of the optics then begin by first pointing the can away from the piece 
and  gently  expel  some  air.  This  will  remove  any  condensate  in  the  air  can 
lines and clear  off  dust  that may  have accumulated on the discharge tube. 
Next using short quick bursts of air carefully remove the dust particles.  
 
DO  NOT  HOLD  THE  TRIGGER  OF  THE  COMPRESSED  AIR  FOR  TOO 
LONG  AS  CONDENSATE  MIGHT  BE  BLOWN  OUT  ACROSS  THE 
OPTICAL SURFACE. 
 
The  optics  of  your  telescope  should  last  a  long  time  before  they  generally 
require  major  cleaning.  By  keeping  the  dust  caps  on  and  avoiding  the 
temptation to handel the lenses or mirrors you will find that very little is need 
in the way of optical maintenance. 
 
 
 

 

Summary of Contents for 400/70

Page 1: ... www seben com manuals Vous pouvez télécharger la notice en français sur http www seben com manuals Per il download delle istruzioni in italiano cliccate qui http www seben com manuals Puede descargar las instrucciones en español aquí http www seben com manuals www ORBINAR com Seben GmbH Ollenhauer Str 73 13403 Berlin Deutschland ...

Page 2: ...l prism 5 Focuser 6 Mount lock knob 7 Aiming Control and lock 8 Tripod legs 9 Finder scope Warning Do not aim your telescope at the sun or anywhere near the sun Instant or irreversible damage can occur including blindness Do not let children use any telescope without adult supervision at any time the sun is above ...

Page 3: ...he telescope tube has a mounting tab on its underside Place this tab into the slot on top of the tripod Tighten the knurled knob on the tripod head to hold the tube tightly to the tripod Screw the aiming control arm into the threaded socket at the rear of the mount Insert the diagonal prism into the end of the telescope tube Insert one eyepiece into the diagonal prism Remove the dust cap from the ...

Page 4: ...ions und distortions If the window is open the moving air currents of different temperatures will cause distortions Let your telescope adjust to the outside temperature Your telescope will perform much better if the lenses and the air inside the tube are all the same temperature as the outside air This process may take up to 1 2 hour if the temperature difference between inside and outside is extr...

Page 5: ...s bright points Once you have located an object and the view is clear you may wish to change to the high power eyepiece You will notice that your object looks bigger but not as bright as seen with the 20mm eyepiece This is normal If the viewing conditions are not good the high power image may not appear sharp or stable If this happens switch back to achieve higher power by inserting 3x barlow lens...

Page 6: ... 3 Once the moisture is gone then replace the dust caps 4 If you wish to remove dust from the lenses or mirrors you first should try using a can of filtered compressed air Remove the dust cap and the dew shield in the case of the refractor style of telescope or take the mirror cell out of the reflecting type Once you are able to freely blow across the surface of the optics then begin by first poin...

Page 7: ...th to month Most people who have looked up at night have probably seen some planets but did not realize it A planet when it is well clear of the horizon will not twinkle as do the stars They are resolved by the eye as tiny balls as opposes to the stars which are infinitely small points of light The easiest planets to view are Venus Mars Jupiter and Saturn Uranus and Neptune Mercury is an object to...

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