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Now pick the eyepiece that the object fits into and enjoy the view.  It will be much better than just 
going by power alone.  

 

Use of 2” Eyepieces  

The Bintel Dobsonian comes with 2” focuser as standard equipment. Because of its large size, it is 
able to accept eyepieces that have a 2” barrel diameter. 2” eyepieces are desirable because they 
allow for a wider field of view than 1.35” eyepieces. Many observers own at least one 2” eyepiece; 
simply remove the 1.25” eyepiece adapter from the end of the focuser drawtube. You must first 
loosen the two thumbscrews on the 2” eyepiece adapter to do this. Now insert a 2” eyepiece into 
the focuser, and secure it with two thumbscrews. Focus the eyepiece as described previously. You’ll 
be stunned at the wide fields of view that 2” eyepieces can deliver. It makes you feel like you’re 
floating through space.  

 

 Objects to Observe  

Now that you are all set up and ready to go, one critical decision must be made: what to look at?  

 

The Moon 

With its rocky surface, the Moon is one of the easiest and most interesting targets to view with your 
telescope. Lunar craters, Marias, and even mountain ranges can all be clearly seen from an average 
distance of 350,000kms away. With its ever-changing phases, you’ll get a new view of the Moon 
every night. The best time to observe our one and only natural satellite is during a partial phase, that 
is, when the Moon is NOT full.    During partial phases, shadows are cast on the surface, which reveal 
more detail, especially right along the border between the dark and light portions of the disk (called 
the “terminator”). A full moon is too bright and devoid of surface shadows to yield a pleasing view.   
Make sure to observe the Moon when it is well above the horizon to get the sharpest images.  

Use the included Moon filter to dim the Moon when it is very bright. It simply threads onto the 
bottom of the eyepieces (you must first remove the eyepiece from the focuser to attach a filter). 
You’ll find that the Moon filter improves viewing comfort, and also helps to bring out subtle features 
on the lunar surface. Some coloured filters also help to cast different shadows.           

 

The Planets 

The planets don’t stay put like the stars, so to find them you should refer to our website 
(www.bintel.com.au/newsletter.html), or to charts published monthly in our newsletter Night Sky or 

Summary of Contents for Dobsonian

Page 1: ...Manual Warning Never look directly at the Sun through any telescope or finder scope even for an instant as permanent eye damage could result Do not point the telescope at the Sun as parts will melt Ch...

Page 2: ...imber base mount Special care needs to be taken while transporting the telescope Please plan your transport of the telescope to prevent it moving around and being damaged The optic tube is quite heavy...

Page 3: ...arm up and dry out If the eyepiece fogs up wrap your hands around it for a few moments As it warms up the fog should disappear DO NOT wipe the lens with a tissue or cloth as it has special coatings on...

Page 4: ...lease ensure it s adjusted to move smoothly but not be loose or unstable Viewing with eyeglasses If you wear eyeglasses you may be able to keep them on while you observe if the eyepieces have enough e...

Page 5: ...images match up The finder scope alignment needs to be checked before every observing session Focusing the Finder scope If when looking through the finder scope the images appear somewhat out of focus...

Page 6: ...ve warm air currents rising from them which distorts the image seen in the eyepiece You should also not observe out an open window from indoors for the same reason The best options would be out of tow...

Page 7: ...nearby porch and streetlights and car headlights will spoil your night vision Tracking Celestial Objects The Earth is constantly rotating about its polar axis completing one full rotation every 24 ho...

Page 8: ...mmended for small and bright objects like planets and double stars The moon also takes higher magnifications as well Deep sky objects however typically look better at medium or low magnifications This...

Page 9: ...our telescope Lunar craters Marias and even mountain ranges can all be clearly seen from an average distance of 350 000kms away With its ever changing phases you ll get a new view of the Moon every ni...

Page 10: ...ost luminous object in the sky excluding the Sun and the Moon It is so bright that sometimes it is visible to the naked eye during full daylight Ironically Venus appears as thin as a crescent not a fu...

Page 11: ...pollution Take plenty of time to let your eyes adjust to the darkness Do not expect these objects to appear like the photographs you see in books and magazines most will look like dim gray smudges...

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