Question about Bushnell Voyager 78-9440 (440 x 12.5mm) Telescope

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Upside down images

When I inserted the Erecting lens into the focusing tube, then the penta mirror into the Erecting lens, I place the 12.5 eye piece on the penta mirror and I'm not able to see anything, it looks dark, what can I do?, the same happens when I tried to use the Barlow lens. Thank you for any help.

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Re: upside down images

ALL astronomical telescopes show upside down images it is normal. Put the eyepiece with the LARGEST number written on it into the diagonal. Do NOT use the 2x barlow it is too much magnification for that small aperture telescope.

Posted on Jul 31, 2011

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All astro telescopes will normally show an inverted image. If you want to use it during the daytime you can fit an erecting prism between the lens and the focuser, like this

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Last used viewing was fine. After being stored the image now is side ways. the same eye piece was used. Hope you can help! Ray

The image is also UPSIDE DOWN -- all astronomical telescopes show inverted images --- it is normal. No up or down in space.

Light simply enters the tube hits the mirror on the back and bounces up and hits the smaller mirror under the focuser. That's all there is to it.

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All astronomical telescopes have upside down images -- there is no up or down in outer space. This is probably a REFECTOR style telescope. The part with the small mirror is called a diagonal. Certain types of diagonals called "erecting diagonal" can be used to flip the image right side up for terrestrial viewing. You do not need them for star gazing.

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The eyepiece with the LARGEST number written on it is your lowest magnification.

Put the eyepiece into the focuser and practice focusing on a distant object during the day time. The image will be upside down. NOTHING is wrong. All astronomical telescopes show upside down images.

Join this free astronomy forum:

You will also need to learn how to polar align the EQ mount. Read my tips on my profile page.

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Everything is upside down on side eye piece. When viewing through the scope that's on the side of the telescope itself, everything is upside down. No matter which way it is turned, the same problem exists.

All astronomical telescopes show upside down images. It's completely normal. Nothing is wrong with the scope. For terrestril viewing you can buy an "erecting prism diagonal" which will turn the images right side up.

Like this:

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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.

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Here is the manual-- read it cover to cover--

1. Take off the lens cap

2. Put your lowest magnification eyepiece into the telescope on the TOP eyepiece port-- there is a lever on the side which rotates the diagonal mirror between the top and rear ports --- can you see light through the telescope? If not turn the lever.

3. During the day practice focusing on a distant object at least 100 yards away-- the image will be upside down -- this is not a problem-- no UP or Down in space.!

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Hi there,
the image in your telescope is suposed to be upside down (you'll find it's back to front too!). The reason for this is to get as much light to the eye as possible, the more lenses/mirrors the light has to go through/reflect off, the greater the light loss, and in astronomy you need all the light you can get.
For terestrial viewing, you can purchase, quite cheeply, an image erecting adaptor. This will make your image the right way up. For the best terestrial viewing, you can still purchase prismatic adaptors. Best bet would be ebay.
If I can be of any further help, don't hesitate


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