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SUN WARNING 

 

Do  not  use  this  telescope,  or  its  finder  scope  to  look  at  or  near  the  Sun!  Even  momentary  visual 
contact  with  the  Sun’s  light  rays  can  cause  instant  and  irreversible  damage  to  your  eye(s).    Eye 
damage can be painless, so there is no warning to the observer that damage has occurred until it is 
too late.  

 

Take extra care when using the telescope during daylight hours, and do not point the telescope at 
or  near  the  Sun.  Do  not  look  through  the  telescope  or  finder  scope  when  you  are  moving  the 
telescope during the daytime.  
 
Never allow anyone to use the telescope during the daytime without warning them of the hazards of 
aiming at or near the Sun. Make sure that they are adequately trained on the use of this instrument 
before allowing them to start observations. Children should always have informed and trained adult 
supervision while observing

 

 

MOVING AND LIFTING 

 
Although the David H. Levy Comet Hunter Telescope is considered a lightweight instrument in its aperture 
class (about 15 pounds for just the telescope, and about 40 pounds with the telescope in its case), special 
care should be taken to make sure that you are not straining to lift or move it. Improper lifting and moving 
techniques can result in back injury and strained muscles. 
 
Often  astronomers  work  at  night  or  in  poorly  lit  conditions,  so  extra  care  must  be  employed.  Whenever 
possible use two or more people to move or lift astronomical gear, or use a cart, dolly or other platform to 
make 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 the case. Double check to make sure that 
the cradle ring lock knobs are secured before lifting the instrument to place on a mount.  
 
If you feel that the weight, shape, or size of any instrument makes the job too much for one person, ask for 
help.  
Whenever possible make use of equipment to help lift and carry heavy gear; hoists, carts, and dollies are 
made for this purpose.  
 

 
WARRANTY AND SERVICE 

 

Product Warranty  

 
Explore Scientific will repair or replace the product, or part thereof, found upon inspection to be defective, 
provided  the  defective  part  or  product  is  returned  to  Explore  Scientific  USA,  freight  prepaid,  with 
confirmation  of  product  registration  for  a  period  of  five  years  from  the  date  of  original  purchase.  Explore 
Scientific  products  purchased  from  the  USA  outside  the  United  States  are  included  in  this  extended 
warranty, but the owner is responsible for all shipping costs (including customs, taxes, etc.), both inbound 
to our USA facilities and outbound to the respective country that the product would be returned to.  
 
Explore Scientific products purchased in other countries are covered under separate warranties issued by 
Explore Scientific International Distributors.  
 

RMA Number Required 

 
Prior  to  the  return  of  any  product  or  part,  a  Return  Merchandise  Authorization  (RMA)  number  must  be 
obtained by writing to Explore 

Scientifics’ Customer Service Department or by calling1-888-599-7597, and 

we will be happy to provide you with return shipping instructions.  

 
 

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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