Telescopes and Telescope Accessories from Celestron, Meade, iOptron, Zhumell and More at Telescopes.com
1-800-303-5873
GUEST#   0
Telescopes Super Sale

Image Orientation - Why Is Everything Upside Down?

1. How To Select Your First... 2. Magnification and Using Eye... 3. Using a Barlow Lens 4. Image Orientation
5. Telescope Mounts 6. Star Parties 7. Polar Alignment 8. Adjusting Your Eyes...
9. Eyepiece Formats 10 Electronic GOTO and GPS... 11. Got a Nice View? 12. Observing Our Closest Star
13. Filters Filters Filters 14. Using Binoculars for Astronomy 15. What Can You See... 16. Astrophotography
17. Can you see the Flag or... ? ? >> Back to the 101 index <<

One of the most surprising discoveries first-time telescope owners will find is that images may appear upside-down or backwards depending on the type of telescope. The first thought is the telescope is broken - when in fact it is working perfectly normal. Depending on the type of telescope images may appear correct, upside-down, rotated, or inversed from left to right.

Why is this? Why would I want to see everything incorrectly? For astronomical viewing, it is not important whether an object is shown correctly. In space there is no up or down. Besides, Saturn is not something you see everyday and you would not know if it was upside-down or not. A Tree, Building, Person or an Automobile for example would be important to see correctly. When you view an automobile upside-down, you recognize that this is not correct. Lets talk about the different types of telescopes and how the orientation of the image is observed through them and what you can do to correct it for land use.

Refractor and Cassegrain telescopes will produce an image that is upside down when used without a diagonal. When a diagonal is used the image will be corrected right side up, but backwards from left to right. It will look like trying to read a sign in a mirror. There are special diagonals called Erect Image Prism diagonals that can correct the backwards image for land use.

Newtonian Reflectors will produce an image that is upside down and are not recommended for land use. There are no ways to correct this with a Newtonian Reflector.

Correct Telescope View of License Plate

Refractor and Newtonian Telescope Views of License Plate Refractor and Newtonian Telescope Views of License Plate


1. How To Select Your First... 2. Magnification and Using Eye... 3. Using a Barlow Lens 4. Image Orientation
5. Telescope Mounts 6. Star Parties 7. Polar Alignment 8. Adjusting Your Eyes...
9. Eyepiece Formats 10 Electronic GOTO and GPS... 11. Got a Nice View? 12. Observing Our Closest Star
13. Filters Filters Filters 14. Using Binoculars for Astronomy 15. What Can You See... 16. Astrophotography
17. Can you see the Flag or... ? ? >> Back to the 101 index <<

Award Winning Telescopes
Popular Pages
Satisfaction Guaranteed
1-800-303-5873
GUEST#   0
Hayneedle, Inc., Internet Shopping, Omaha, NE
Telescopes.com is a Hayneedle Inc. store. Copyright 2007 - 2014 , Hayneedle Inc., all rights reserved.