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Small lens on side image is unside down - Optics

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Not a problem, all astronomy scopes are inverted views. just takes getting used to.

Posted on Oct 11, 2010

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Dear Sirs, I got a Barska telescope 84-4363 (lens 76700), when looking through it the picture is upside down. There is a additional mirror sent with, but the picture then is not clear anymore. Since there...


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.

Apr 13, 2011 | Barska Optics 84-4363 Telescope

1 Answer

Why dose the image look unside down


All astronomical telescopes show upside down -reversed images. This is completely normal. If you want to use the scope for terrestrial viewing you can buy an "erecting diagonal" like these:
http://www.astronomics.com/main/Image_Erecting_Prisms.asp/catalog_name/Astronomics/category_name/EDNECFUVSRWS8KLNTU5E38XSE1/Page/1

Read my Frequently Asked Questions TIP on my profile page.

Oct 29, 2010 | Tasco Luminova 40114675 (675 x 114mm)...

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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)...

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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.

Jun 01, 2009 | Fieldvision 114mm Reflector (114 x 114mm)...

1 Answer

Assembly Drawing for Bausch and Lomb Harbormaster


Dear Hlkwan,
Please clean all lence with tisue paper.Telescope gives always up side down .If you want real image you must image erractor on the eyepaiese.
Thanks.
Dhananjay Raval

Aug 22, 2008 | Bausch and Lomb Harbormaster 68-3576 (35 x...

1 Answer

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.



www.telescopeman.org
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Jan 05, 2008 | Bushnell Voyager 78-9440 (440 x 12.5mm)...

7 Answers

Upside down images


As we all learned in grade school, telescopes produce an upside down image - it's okay for astronomical use since upside down doesn't matter. If you want an image like you'd see in a pair of binoculars, get an image erector from a telescope accessory store to add to your eyepiece.

Aug 01, 2006 | Fieldvision 114mm Reflector (114 x 114mm)...

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