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

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Posted on Dec 27, 2010
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First time telescope - after assembly, view through lens is upside down.

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Joe Lalumia aka TelescopeMan

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  • Master 3,186 Answers
  • Posted on Dec 28, 2010
Joe Lalumia aka TelescopeMan
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All astronomical telescopes show upside down images-- it's normal. NO up or down in space!

Read my tips on my profile page-- especially the Frequently Asked Questions TIP.

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1answer

I have a Celestron beginner First Scope telescope. The target is upside down. How do we adjust the telescope to get the target right side up?

Hi, Linda,
Astronomical telescopes always display the image inverted, since the major use is viewing stars, which look pretty much the same either way up. The only time you'll notice the difference is if looking at the Moon, or Jupiter.
The reason is that the lens assembly which corrects the view for terrestrial use is omitted, to enhance the telescope's light-gathering power, to enable the user to see greater distances.
I believe it is possible to obtain a correction adaptor, for terrestrial viewing, for some telescopes.
HTH
Dec 03, 2017 • The Optics
1helpful
1answer

Image is upside down (inverted)

All astronomical telescopes show upside down images this is normal.

You can buy an "erecting prism" to use for terrestrial viewing from many on-line retailers here is one: This will flip the image so it is not upside down.

http://www.amazon.com/Bushnell-780103-1-25%C3%93-Format-Erecting/dp/B000EY2ZFK
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How to focus telescope lens for city viewing?

No no manuals. The smaller the number written on the eyepiece the GREATER the magnification.

However many astronomical telescopes show everything upside down. This is normal -- no up or down in space. You can buy and erecting prism diagonal for terrestrial viewing which will turn the image right side up.

http://www.scopecity.com/detail.cfm?ProductID=1775


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Image is upside down

A telescope sees that way. you have to have a corrective lens to right the view. Its a physics thing about how light goes thru a lens and at the lens flips over upside down, you need another neutral lens to flip it right side up again. If you got the entire kit try another lens till you find the corrective lens.
10helpful
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Upside down images on my telescope. Bought used -no manuel. What to do?

In a refractor images are upside down as with most telescopes. You need an image erector to create a normal correct R and L and Up and Down image. It is a lens which goes in front of the eyepiece to give a correct image.
2helpful
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Things are upside down looking thru the eyepiece on main telescop

If things are upside down in your telescope, you probably have a reflector telescope.it has curved mirror in the sealed end.take off the cover near the finder and point in the general direction of what you want to see.Make adjustments with the stuff on the mount.If you are viewing terrestrial objects, you will need an inverting lens to correct the image.It is called a Barlow lens and is much longer than the other lenses that come with the telescope.Good Luck
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Everything is upside down thru the lens

Reflector telescopes are design for looking at stars, and in space there is no right side up. Try taking it out at night and look at the moon. Your telescope is performing just as it should, there are no problems with upside down views when looking at objects on the ground.
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View upside down

There is nothing wrong. All astronomical telescope show object as upside down. There is no up or down in space!
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Bushnel North Star

No you do not have anything wrong. When ever light is passed through a lens it is inverted. Binoculars, and land viewing telescopes use a special lens combination or "erecting" prism to flip the image for you. The problem with that is it reduces the amount of light that passes through the telescope. It's not an issue for land viewing because these things tend to be close and bright. For astronomy objects are so faint that you actually get a better view when things are upside down.
Sep 24, 2007 • Optics
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