Question about Bushnell NorthStar Goto 100mm 788840 Maksutov-Cassegrain Compact Telescopes

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GO TO northsar program not working.

I got the bushnell 100 mm maksuvot cassgrain for $540! I frusterated with its results it has a really sharp focus and all but im still doubting that its worth the money paid for it. Whenever i used the the go to prgram to get me to an object the sky it went to a place totally different. When jupiter was clearly in the sky it said it was bellow the horizon or even took me to another place nowhere near it. I think i set the system correctly. To reset it i tried taking the batteries out for a while and putting them back tlike the customer survice said to but that still didn't resolve the problem. PlEEESEE If you r reading this please help me with this fusterating problem!!! Any help is appreciated so pls give it a thought. Thanks to whoever takes attention to this note.

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2 Answers

Re: GO TO northsar program not working.

You haven't mentioned aligning the system, have you done that? (instructions in the manual)

Posted on Nov 04, 2008

Re: GO TO northsar program not working.

Actually i find out from bushnell that i got a bad peice. Thanks for those who did try to help and if there r people who hav the same problem get a new one becauseit might jus be a bad peice. Thanx all

Posted on Aug 29, 2007

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We have a bushnell 78-8831 telescope, after assembly we still cannot view any images.

1. use the lowest power eyepiece (highest number in mm)
2. Point the scope towards a object (about 1000yds) away during the day and see if you can focus on the object. If you can not see anything during the day there is a problem either with the scope or set-up
3. Align the finder to the daylight object so it is ready for night viewing.
4. First night object should be the moon. Easy to find. ( A full moon presents poor seeing but this is just to get used to the scope.
5. Once the above steps are completed, use a good star program to find interesting objects (Stellarium, Cartes du Soliel, C2A are all freeware)
6. If you can not see the daytime object, remove the eyepiece and look down the focus tube. You should see a reflection of your eye in the primary mirror. If not, the primary and/or secondary mirror need to be collimated (aligned) refer to your owners manual.

Jul 12, 2011 | Bushnell NorthStar 78-8831 (525 x 76mm)...

1 Answer

I need manual for my bushnell refractor telescope.i can not see anything.

All of Bushnell's manuals are on this web site:

Look down the page for your telescope. The manual will NOT tell you how to use the telescope. It is only assembly instructions. Take the scope out in the day time and practice focusing on a distant object. DO NOT USE the 2x barlow if you have one. Just put the eyepiece with the LARGEST number written on it into the focuser. Turn the focus knob to the right and or left until you get a sharp image on a distant object during the day time.

Read my TIPS on my profile page.

Apr 22, 2011 | Bushnell SkyTour 78-9960 (700 x 60mm)...

1 Answer

I am able to see with the 20m Lens but once i insert the 5mm Lens it looses focus and i cannot see anything, i tried adjusting the focus again with no success. The worst thing that even at day light i...

That's because the 5 mm is too much magnification for your small telescope. Maximum magnification is a function of APERTURE. Which is how big is the front lens or the mirror.

Your scope has about a 2 inch aperture, so the maximum posiible magnification is about 100 power (if it is like the one in the picture above)

50 times aperture (2 inches)-- 100 power

It will only achieve 50 times if the optics are perfect and the sky is very transparent and stable. Usually only 30-40 times is all you normally get.

Nov 21, 2010 | Bushnell Deep Space 78-9512 (120 x 60mm)...

1 Answer

I cant get an image or focus

Put the eyepiece with the largest number written on it into the focuser. DO NOT USE the 2 x barlow if you have one. Go outside during the day time and practice focusing on a distant object, by turning the knob on the focuser in both directions until you see a sharp image.

Sep 29, 2010 | Bushnell NorthStar 78-8830 (525 x 76mm)...

1 Answer

Can't focus using 5mm lens

TOO much magnification for that 3 inch telescope. The most you will get is about 120 power or so on perfect sky nights. Try a 10mm or 9 mm as your most powerful eyepiece.

50 times aperture is the maximum possible.

Jan 19, 2010 | Meade ETX-125EC (500 x 127mm) Telescope

1 Answer

?? I am having the same problem. The eyepiece I am using is 22mm?

Put the 22mm eyepiece into the focuser. The focuser end is pointed UP, the big mirror is on the bottom. Take the lens cap off, and go outside during the daytime and practice focusing on a distant object.

Sep 16, 2009 | Bushnell NorthStar 78-8846 (675 x 114mm)...

1 Answer

New bushnell telescope, cant see anything, what am i doing wrong?

Put the lowest power eyepiece in the telescope-- that's the one with the LARGEST number on it.

Go outside and practice focusing on a distant object at least 100 yards away-- turn the focus knob slowly.

Dec 26, 2008 | Bushnell Voyager 78-9945 Telescope

1 Answer

New Telescope

Meade and Celestron both make small goto scopes--

However can I persuade you to buy a nice PUSHTO Dobsonian like this one--

Jan 26, 2008 | Bushnell NorthStar Goto 100mm 788840...

1 Answer

Aiming with the computer

i hav the exact same problem with my bushnell 100 mm makstovut cassgrain check my problem and see if the solution for it works cuz for me it isn't right now.

Aug 09, 2007 | Bushnell NorthStar 78-8890 (300 x 90mm)...

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