Question about Edu-Science (10166) Telescope

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I took apart my edu science Land and Sky 90X telescope and didn't realize there were two lens at the large end until they slipped apart in my hands (one thicker than the other) and got mixed up. There was also one thin plastic ring. Now I don't know which goes in first and which way the curves needs to face. Please help. Thank you.

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  • 3,186 Answers

You will need to experiment replacing the lens in various configurations to see what works.

Next time NEVER disassemble an eyepiece or a telescope lens. Only the outside surfaces ever need cleaning.

Posted on Apr 09, 2011

  • thomasrossit Apr 10, 2011

    Thank you for your response. I've tried several configurations but can't seem to get it to focus on anything. Is there no general rules of thumb for how the lens' should be arranged? Would it focus on a closer land target by being adjusted shorter or longer in length, as opposed to the moon? Thank you.

  • Joe Lalumia aka TelescopeMan

    No -- depends on how that lens was ground and configured.

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Posted on Jan 02, 2017

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Where can I find an instruction manual for edu science land and sky 360 (50mm refractor) telecope?


Check the manufacture. If you didn't have it too long take it back to T...R...US and go elsewhere and by a good scope.

Aug 31, 2014 | Edu-Science Edu Science 50mm Telescope...

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How do i use it..??? and how do i locate planets in the sky


Planets travel across the sky on the same "path" that the sun took during the day. This is called the ecliptic (path of the sun.

Jupiter is up after dark and is VERY bright -- point the telescope to the BRIGHTEST "star " in the sky after dark.

Read my tips on my profile page, and download a free monthly star chart here:

www.skymaps.com

Jan 31, 2011 | Edu-Science (10166) Telescope

1 Answer

I have a 90x Land & Sky telescope and the 20mm eyepiece has disappeared. Is it possible to get a replacement?


Yes -- eyepieces come in 3 sizes .965, 1.25, and 2 inch sizes. Measure the hole in the focuser and buy the correct size.

Here are two retailers:

http://shop.telescope-warehouse.com/

http://www.agenaastro.com/

Dec 15, 2010 | Edu-Science (10166) Telescope

1 Answer

Hello. My daughter received the 120mm Astro-Nova 525x telescope as a gift. There was an instruction paper for putting it together which I did. It also had the star chart and the "Getting the Most...


I would be surprised if ToysRus told you to contact FixYa. This is an advice site largely manned by volunteers, with no connection to ToysRus or Edu-Science. I would suggest that you contact Edu-Science to get the missing CD, or insist that ToysRus refund for the defective (missing parts) item they have sold you.

Don't worry about Jupiter. It is not going to disappear. I have been watching it for decades and it is almost always up there.

Nov 20, 2010 | Edu-Science (10166) Telescope

1 Answer

We've a 600X power edu-science telescope which seems to be missing the inner ring which might be what the instructions call a secondary precision mirror.


The secondary mirror is a small tilted mirror near the front end of the telescope mounted on what's called a "spider". It reflects the light from the large mirror in the bottom back out through the hole in the focuser.

Usually these are already assembled and in place when you buy a reflector style telescope.

See this web site and watch the video:

http://www.andysshotglass.com/Collimating.html


Jul 17, 2010 | Edu-Science (10166) Telescope

1 Answer

I just purchased an edu science 102mm telecope. I


The end with the focuser. Then put the eyepiece with the largest number written on it into the focuser. I believe this model is a REFLECTOR, if it is there is a mirror in the bottom of the scope.

REFRACTORS have a lens in the front of the scope.

See this:
http://www.texasastro.org/telescope.php

Then read my Frequently Asked Questions TIP on my profile page. The picture you selected shows a REFRACTOR telescope.

Mar 18, 2010 | Edu-Science (10166) Telescope

1 Answer

When I look through the telescope all I see is black. I can look through the finderscope and see things. But I can't seem to see anything but black from the telescope. edu science 102mm Astro-Nova telescop...


Basics first - please don't get angry at the suggestions ......

1) On the main telescope, can you see the actual glass lenses at both ends of it (i.e. you've removed both of the lens caps).

2) If you remove the eyepiece (in broad daylight), can you hold it up to an indoor light and see clearly through it?

3) If you now look into the socket where the eyepiece goes, can you see any form of light (in daylight) or is it totally black?

A lot of smaller telescopes have caps both ends, and sometimes caps both ends of both parts, to stop debris getting in when in transit or swapping objectives.

Feb 28, 2010 | Edu-Science (10166) Telescope

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My edu science telescope got only one lens where can i buy edu science telescope lens in the philippines, any outlet in manila


You can buy eyepieces at many on-line retailers. Measure the hole. Eyepieces come in 3 sizes; .965, 1.25, and 2 inch sizes.

http://www.agenaastro.com/Telescope-Eyepiece-s/3.htm

http://www.optcorp.com/category.aspx?uid=30-718

Nov 19, 2009 | Optics

2 Answers

How to use telescope at night?


Many people have the same problem-- with these small telescopes you are stuck with seeing only the moon, and several other planets, and maybe a few bright star clusters.

These are all TINY objects (except for the moon).... when you look through the telescope you are looking at a section of sky about the size of your fingertip held at arms length-- the scope must be pointed DIRECTLY at the object. Practice on the moon first-- and then try to find Saturn which is up in the sky right now-- it looks like a dim (slightly yellow) star.

Download a free star chart at www.skymaps.com ---

Apr 01, 2009 | Edu-Science (10166) Telescope

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