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A Message from Explore Scientific 

 
 

We wish to thank you for choosing a David H. Levy Comet Hunter 152mm f/4.8 Maksutov-Newtonian telescope! It is 
quite literally a telescope that was born to share the sky; a portion of each sale goes to the National Sharing the Sky 
Foundation,  a  non-profit  organization  based  in  Arizona,  where  David  Levy  and  his  staff  support  schools  and  the 
general public around the world in their quest to learn more about science through hands on astronomy. 
 
We  hope  that  you  use  your  Comet  Hunter  as  often  as  possible  and  that  you  seriously  consider  getting  involved  in 
public  outreach  in  astronomy  in  your  local  community.  If  you  don’t  already  know,  astronomy  outreach  is  a  very 
enriching  and  rewarding  activity  where  your  knowledge  and  your  telescope  help  to  give  people  of  all  walks  of  life  a 
deeper understanding of our place in the universe and greater insight into what all humans have in common.  
 
It was Carl Sagan who said. “

Earth is a very small stage in a vast cosmic 

arena.”

 Just looking up at a star-filled sky 

humbles most of us, opens our minds, and just  with a little astronomical  background knowledge confronts  us  with  a 
profound  truth  that  we  are  somehow  interconnected  with  the  cosmos.  With  your  telescope  you  can  share  the 
experience  with  friends  and  family,  you’ll  find  that  it  will  be  a  truly  mind  expanding  experience  for  them  and  for 
yourself. 
 
While  sharing  the  eyepiece  of  your  Comet  Hunter  to  show  others  the  belts  of  Jupiter,  or  the  faint  glow  of  a  distant 
galaxy  is  fun  and  interesting,  exposing  others  to  astronomy  has  many  other  direct  benefits.  The  very  act  of 
contemplating the vastness of the universe lets one experience a feeling of tranquility, and creates some space within 
to put priorities into perspective. It can motivate young people to pursue careers in technology, medicine, engineering, 
and mathematics. There are few things more gratifying than opening the minds of others, fostering a sense of wonder, 
providing  greater  understanding,  and  setting  them  on  a  never  ending  journey  of  learning.  Ultimately  astronomy  can 
motivate people around the world to support bold programs of exploration and discovery.  
 
Those  who  encourage  others  to  join  in  on  the  adventure  of  exploring  the  sky  and  the  universe  are  engaged  in 
astronomy  education  and  public  outreach,  and  we  hope  that  you  too  become  involved.  You  can  start  with  a  free 
membership in the Explore Alliance and connect with one of the Alliance Partners. You can learn more by going online 
to www.explorealliance.org.  
 
Should you have any questions or suggestions for us, please don’t hesitate to contact our Customer Service center at 
(888) 599-7597. We will be happy to help you. 

 
 

The Team at Explore Scientific 

www.explorescientific.com 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 

 

 

Содержание David H. Levy Comet Hunter

Страница 1: ...Owner s Guide David H Levy Comet Hunter 152mm f 4 8 Maksutov Newtonian Telescope...

Страница 2: ...ke movement safe and easy When lifting the Comet Hunter telescope from its case use the handle provided from the cradle ring and gently pull the instrument until it is free from the foam padding of th...

Страница 3: ...n be passed on to future generations of would be astronomers We discussed a lot of ideas settling on a six inch 152mm aperture f 4 8 rich field system We then selected a rugged Maksutov Newtonian opti...

Страница 4: ...e with friends and family you ll find that it will be a truly mind expanding experience for them and for yourself While sharing the eyepiece of your Comet Hunter to show others the belts of Jupiter or...

Страница 5: ...2 Cradle Rings with Handle 3 8x50 Correct Image Finderscope 4 Finderscope Illuminator 5 10 1 Two Speed Focuser 6 Focus Lock Knob 7 Focus Tension Knob 8 30mm 70 Series Eyepiece 9 2 to 1 25 Eyepiece Ad...

Страница 6: ...objective lens focus adjustment by turning it counterclockwise while firmly holding the objective lens focus lock ring 1 Fig 3 Further separate the objective lens focuser 2 Fig 3 and the focuser lock...

Страница 7: ...red The batteries will last several hours of continuous illumination less in cold weather more in warm conditions When not using the finder scope turn the illuminator off by turning the knob counter...

Страница 8: ...he dust cover release the eyepiece holder set screw and slide the eyepiece barrel into the focuser Tighten the eyepiece holder set screw to secure the eyepiece To use 1 25 O D eyepieces slide the 1 25...

Страница 9: ...rformance Confirm Alignment To confirm optical alignment look down the focuser drawtube 1 Fig 10 with the eyepiece removed The edge of the focuser drawtube frames reflections of the primary mirror 2 F...

Страница 10: ...head screw by using a wide flat head screwdriver to unthread it from the secondary holder Primary Mirror Adjustments If the secondary mirror 1 Fig 10 and the reflection of the primary mirror 2 Fig 10...

Страница 11: ...desiccant stored in the telescope s case to ward off moisture and the possibility of fungus or mold growing on and within the coatings of the optics Replace the desiccant as often as necessary Those...

Страница 12: ...f just spreading them over the optical surfaces If you are cleaning small optical surfaces you can roll the tissue into a small wand use a cotton swab alone or use a tissue wrapped cotton swab dependi...

Страница 13: ...6 mm Obstruction 49 mm Focal length 731 mm Focal ratio f 4 8 Resolving power 0 74 arc seconds Material primary mirror BK 7 Coatings Enhanced Multi Layer Deposition EMD Coatings on Primary Mirror and C...

Страница 14: ...2009 Explore Scientific BRESSER A JOC Company 7401 Katelyn Ct Suite A San Diego CA 92120 USA Rev 1 1 Tel 1 888 599 7597 Fax 1 888 877 7248 www explorescientific com Part No UG CH102009...

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