Question about Bushnell NorthStar 78-8831 (525 x 76mm) Telescope

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Red dot finder scope

Can somebody give me detailed instructions on how to align a red dot finder scope?

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Simple-- you can also do this during the day on an object at least 100 yards away-- but at night; get the moon centered in the eyepiece and without moving the telescope center the red dot on the moon. This will get you almost aligned-- then put a bright star in the eyepiece and readjust the red dot to center the star.

Posted on Jan 11, 2009

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Cant see anything through the view finder


1. During the day, use the 17mm eyepiece on a object outside (telephone pole, water tower, etc) then align the finder to what you see in the scope.
2. Put in the 7.5mm eyepiece and fine align the red dot finder.
3. At night, point the finder at the moon (less than half moon or the image is too bright without a moon filter) Use the 17mm eyepiece.
4. Once you see the moon, switch to the 7.5mm lens and enjoy.
5. Download Stellarium or any free astronomy software and see what is in your sky tonight. Your scope should be able to see Jupiter and its moons easily.(Saturn, Mars and Venus when the time is right) Open clusters like Pleiades will be nice is this fast scope.
5. If stars are not sharp, you may need to collimate the scope. Look online for general instructions.

Nov 14, 2011 | Telescopes

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The battery for the red dot finder scope on my Bushneel 78-9669 scope appears to be dead.\r\nHow do I remove the dead one ? What is the button battery number for a new one? Thanks.......Mike


Most red dot finders use a small watch style battery-- there will either be a compartment underneath and or something that opens on the side that contains the watch battery.

Jul 13, 2011 | Bushnell 78-9669 Telescope

1 Answer

We are trying to test out viewing land based objects using the 30X eyepiece, which according to the instructions, should appear right side up and not upside down! This is not happening.


It's NOT really a problem. ALL reflector style telescopes show upside down images. This will not affect your star gazing since there is no UP OR DOWN in outer space. Read my tips on my profile page.

You can buy an "erecting diagonal" for terrestrial viewing- BUT this is not what an astronomical telescope is actually used for.

So align the small finder scope on a distant object like the top of a telescope pole during the day time. Point the main tube at the pole and get the tip top in the main tube's eyepiece. Without moving the telescope adjust the crosshairs on the finder scope on the exact same spot. The moon should be your first target at night and you can check and refine the finder scope on the moon.

Mar 12, 2011 | Bushnell 3" Reflector Telescope 60% OFF w/...

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I have a new Brookstone compact telescope. The image in the smaller viewfinder is upside down making it difficult to line up with image in main telescope. Is this normal? And if so, any suggestions for...


Astronomical telescopes usually show an upside down image. There is a good reason for this- erecting the image needs more bits of glass in the light path, which reduces the amount of light and increases aberrations. Even if this is only slight, astronomers prefer to avoid it, and they don't really care which way up the Moon or Jupiter appear. It is possible to fit an erecting prism or eyepiece to most astronomical telescopes, and some of them come with one, but one wouldn't bother to do this with the small finder scope.

Telescope manuals recommend that you align the finder scope in daylight, by pointing the main scope at an object on the horizon and adjusting the finder to match (never point a telescope toward the Sun!). Once you have a tree or mountain peak in the center of the main scope's image, you can then adjust the screws around the finder scope to get the crosshairs (or red dot) centered on the same object. It is very difficult to do this job in the dark, especially as objects in the sky are constantly on the move.

Jan 22, 2011 | Telescopes

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Trying to use the telescope but cant see anything


Hi, this is a real handy scope. You need to remove the disk like cover for the high polished mirror located at the but end of the scope. Then insert one of the two ocular lenses provided into the viewing aperture. Next, aim the polished mirror end at something obvious like a street light. Use the range finder located opposite the viewing aperture, (switch red button on) and align the circles with the red dot. Happy viewing!

Nov 16, 2010 | Celestron AstroMaster 114 AZ (50 x 114mm)...

2 Answers

Cant see ****


Cannot see anything in the daytime? We need more details.

Put the eyepiece with the largest number written on it into the focuser. Try focusing on a distant object during the day time.

You must follow the setup procedures in the manual for accurate GOTO function at night.

Nov 09, 2010 | Celestron NexStar 114GT (269 x 114mm)...

1 Answer

I need to get a replacement red dot finderscope for a 78-8831 telescope.


Many on-line retailers sell these-- here are two:

http://agenaastro.com/optical-accessories/finder-scopes/red-dot-unity-1x-finders.html?SID=mabkh7sllc66d40c2bapar09r0

http://www.telescope.com/control/telescope-finder-scopes

Aug 19, 2010 | Bushnell Telescopes

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Can somebody give me detailed instructions on how to set up a red


I don't fully understand your question--- but

Here is a place that sells red dot finders
http://www.telescope.com/control/category/~category_id=finder_scopes/~pcategory=accessories;jsessionid=673DFBAEF16C9717304DE7863D541CF6.ivprod2

They are very simple-- they project a tiny "red dot" like a gun sight when you look through them. You line them up with your telescope and use them to quickly aim the telescope.

Jan 09, 2009 | Bushnell NorthStar 78-8831 (525 x 76mm)...

1 Answer

How do you align the 78-7860


Align the small finder scope with the main tube. During the day time point the scope at at the top of a telephone pole and get the top centered in the eyepiece on the main tube. Then without moving the tube adjust the crosshairs or the red dot to point at the exact same spot.

www.telescopeman.us
www.telescopeman.org
www.telescopeman.info

Jul 06, 2008 | Bushnell NorthStar 78-7860 (563 x 60mm)...

1 Answer

Red dot finderscope alignment problem


point the telescope at some thing during the day and adjust the finder scope and at night point at a star look through the eye piece and center the object in the eye piece then adjust the finder scope.

Jun 04, 2008 | Bushnell NorthStar 78-8831 (525 x 76mm)...

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