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When looking thru the lens everything is upside down

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Astronomical telescopes normally 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.

Posted on Jan 01, 2011

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SOURCE: 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.

Posted on Apr 02, 2009

SOURCE: everything is upside down

Yes all astronomical telescopes are upside down! No up or down in space!

You can buy an erecting diagonal for about $45 from Orion Telescopes to use for terrestrial viewing.

Posted on May 15, 2009

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How do i fix my selsi telescope,everything is upside down? I know nothing about them.


All astronomical telescopes show upside down images. It's completely normal. Nothing is wrong with the scope. The normal correcting lens is omitted in order to maximise the light-gathering power. After all, stars look the same both ways up ! The only times you may need to mentally correct is when looking at the Moon or Jupiter.

Oct 20, 2016 | Optics

2 Answers

Own 102mm ASTRO-NOVA telescope 525x power.when looking thru the finder scope everything is upside down...purchased to view lake home boats, birds,ect. what is the matter?


there is one more piece that gos to the end you put your eye on it .if you take it of you will see it is just a mirror not the lens that you need.

Jan 25, 2010 | Edu-Science (10166) Telescope

1 Answer

Everything is upside down. The larger eye piece looks foggy.


The image is often 'upside down' in telescopes. You can correct this with an auxiliary lens to make the image the right way up. It is very awkward traversing the sky backwards and upside down. If the larger eyepiece looks foggy then first clean the outside of each lens with a lens cloth or isopropyl alcohol and a cotton bud or clean and lint free cloth. If this does not solve the problem this means that some moisture has got into the lens housing and the only way to get rid of it is to either remove a lens or to drill a small hole in the side of the housing and then gently heating the lens near a radiator until the moisture has disappeared and then seal up the hole with a blob of epoxy resin or sealing mastic or gaffa tape.

Oct 30, 2009 | Meade Polaris 50AZ-M 450 Power Telescope

2 Answers

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.

Jul 05, 2009 | Meade ETX-90EC (325 x 90mm) Telescope

2 Answers

Just came into a used tasco 302048 . Everything is upside down!!!


the scope is made for both terrestrial viewing and astronomical. In order to see terrestrially upright, you need an inverting STAR DIAGONAL. The eyepiece will do nothing for inverting the image. you might have 2 diagonals in the kit that came wih the scope. the diagonal is the part that fits into the scope. then you place the eyepiece in the diagonal. if you have 2 diagonals , one is a 90 degree angle,(astronomical) and one is a 45 degree angle, (terrestrial). the eyepieces change the magnification of the image. the bigger the number (9mm, 20mm, 26mm,) the smaller the image. the smaller the number , the bigger the image gets. the number is inverse of the image. Hope this helps.

Jul 01, 2009 | Tasco Luminova 40060660 (660 x 60mm)...

1 Answer

Everything is upside down its an inexpensive national geogra childs telescope when you look thru it everything is upside down


Yes all astronomical telescopes are upside down! No up or down in space!

You can buy an erecting diagonal for about $45 from Orion Telescopes to use for terrestrial viewing.

May 12, 2009 | National Geographic NG70CA (225 x 70mm)...

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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

Mar 25, 2009 | Edu-Science (10166) Telescope

1 Answer

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.

Mar 17, 2009 | Meade Polaris 114EQ-D (36 x 114mm)...

1 Answer

Believe we are missing a couple of lenses. objects are upside down. thru big scope and finder scope. what gives ?? do i need to return it for another one?


You are not missing any lens. All astronomical telescopes present the image upside down and reversed. This is normal--- no up or down in space!

Jan 09, 2009 | Edu-Science (10166) Telescope

2 Answers

Inverted image


All images in astronomical telescopes are upside down and reversed-- this is normal. There is no up or down in space. Reversing the image just adds more GLASS to the light path.

Nov 13, 2008 | Bushnell NorthStar 78-8846 (675 x 114mm)...

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