Question about Bushnell NorthStar 78-7860 (563 x 60mm) Telescope

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How do you align the 78-7860

A friend brought us this scope to see if we can get it to work. First step is to align the tube. The manual doesn't really have instructions on how to do this. Can't get past step one until we can do that. Thanks. Lloyd

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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

Posted on Jul 09, 2011

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I have a celestron Cosmos 90 GT Wifi telescope and so far haven't been able to use it. I struggle with aligning the telescope to 3 bright stars... if by chance it says its aligned when I choose a star


Aligning a scope requires several things to be correct.
1. You must follow the setup in manual 100%
2. You must pick the correct alignment stars. Most failed alignments are because you aligned on the wrong star. So alignment requires you to learn the names of a few bright stars and be able to spot them in the sky.
3. With many goto scopes there might be a "home position" to start the alignment. For example, tube pointed roughly North, and level. Check your manual for a "home position. Also time, date, and site must be correct.

Clear skies,
TelescopeMan
www.telescopeman.org and www.telescopeman.info

Feb 16, 2015 | Celestron COSMOS 90GT Wi-Fi Refractor...

1 Answer

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

When I have my 8mm or 4 mm all I see is black. any suggestions? with the naked eye I can see stars and with the aiming scope I see them but through main eyepiece I see nothing.


The finder scope must be aligned with the main tube. Get a bright star into the MAIN tube eyepiece. Then without moving the scope adjust the crosshairs in the small finder scope so they CROSS at the same star.

Mar 27, 2011 | Vivitar Optics

2 Answers

Need owners manual for Venture RX-7 telescope


You will not find a manual. BUT you do not need one.

This is a very simple reflector telescope on an Equatorial mount. The mount must be polar aligned in order to properly use the scope. Read my TIP in my profile section about aligning an Equatorial mount.

The major steps are:

Align the small finder scope with the main telescope tube on a distant object.

Set the Declination axis to your Latitude.

Align the main tube with the axis of the mount.

Point the entire mount toward the North Star Polaris.

Use the fine RA & DEC knobs to center Polaris in the eyepiece.

See this web site and my tips--
http://www.astronomy.net/articles/4/polaralign.html

This is why we NEVER recommend an EQ mount to a beginner. Polar Alignment just introduces one more FRUSTRATION to someone new to the Astronomy hobby.

The eyepieces simply go into the focuser. The Larger the number written on the eyepiece the LESS the magnification.

Take the scope outside during the daytime and practice focusing on a distant object using the eyepiece with the largest number.

The manual WILL NOT tell you how to find those small dim objects in the sky. It's just assembly instructions.It does not tell you how to become an amateur astronomer.

Locate a local Astronomy club and seek advice from the members, who will be glad to help you with your telescope.

Buy these two books available on amazon.com

Turn Left at Orion

and

Nightwatch

Read my tips on my profile page, and read this:
http://www.texasastro.org/telescope.php

Aug 11, 2010 | Optics

1 Answer

Lost my manual


You have a 60mm refractor telescope on an equatorial mount. First the mount must be polar aligned in order to useit. Second I believe these take .965 eyepieces. Most amateur scopes use 1.25 inch eyepieces,

The eyepieces are very cheaply made. Some may also have plastic lens instead of high quality glass, and they are not muti-coated lenses.

Why am I saying all this? because this scope will frustrate you. The tripod is shaky and the connection between the mount and the scope tube is never solid. The scope will not stay pointed and it will be difficult to move it around the sky accurately. Sky objects are very tiny. Less than the tip of you finger held at arms length!

We never recommend an EQ mount to a beginner, and never recommend a 60mm telescope. You could have bought a pair of 10x50mm binoculars and they would have been much better for astronomy.

The manual will NOT teach you how to polar align the scope or how to find objects in the sky.

Read my TIPS on my profile page Frequently Asked Questions, and also the one on aligning an equatorial mount on the star Polaris.

This is the only manual I have ever found-- someone took images of the manual and posted it on-line-

here:

http://www.flickr.com/photos/7788977@N08/sets/72157610357951752/



Jul 21, 2010 | Tasco Astronomical 302675 Telescope

1 Answer

Simmons 8x32-44ao rifle scope


Is that the "Prairie Master"? I think Simmons is pretty uniform in that range of scopes--elevation adjustment should be the top dial and windage is on the side. The zoom locking ring should be in front of the eyepiece, with the zoom ring just forward of that.

You can download a generic Simmons scope manual from the Simmons site at this link: http://www.simmonsoptics.com/downloads/manuals/archive/HSI_Simmons%20Generic%20Scope%20Adjusting%20Instructions.pdf

Mar 31, 2010 | Simmons 510513 3-9x40 Blazer Riflescope -...

1 Answer

150-1400 Newtonian telescope Set the sight scope eye piece on the moon and looked in the pl 25mm lens in the focusing tube and no image? Can anyone help Philip moondogs2@myway.com


You must align the finder scope with the main telescope tube--

During the daytime look at something far away in the main scope-- without moving the scope center the cross hairs on the finder scope.

Good luck

May 04, 2009 | Optics

1 Answer

Cannot find a planet?


you need to align your finder scope with the main tube see how to do this here http://www.scribd.com/doc/11827347/Tasco-Telescope-Manual

Sep 13, 2008 | Tasco Luminova 40114675 (675 x 114mm)...

1 Answer

Bushnell telescope 78-9669


You must first learn how to focus it in the day time. Put the eyepiece with the largest number written on it into the focuser-- do NOT USE the 2x barlow if you have one. Practice focusing on a distant object. The red dot FINDERSCOPE must also firt be aligned with the main tube -- it is used to POINT the scope at an exact spot in the sky.

Objects in the night sky are tiny and the scope must be pointed directly at them to see anything. Locate a local Astronomy club and they will help you. Also read the manual completely.

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

Jul 13, 2008 | Bushnell 78-9669 Telescope

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