Question about C-Star Optics TT-150 Telescope

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I am inexperienced at this, attempting to enjoy this with my grandsons...When using the diagonal mirror, what is the difference in using the H20 eyepiece and the SR6 eyepiece? When using the 1.5x Erecting Lens or the 2x Barlow Lens, which eyepieces should I use, the H20, the SR6, or the H1.25? Thank you.

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The numbers on the eyepieces are the focal length in millimetres. You can calculate the magnification of the telescope by dividing the focal length of the main objective by the focal length of the eyepiece in use, so if the main focal length is 700mmm and you use the H20 (Huygens 20mm) eyepiece, you will get a magnification of 35. The SR6 ( Symmetric Ramsden 6mm) would give about 117 magnification. You will find that the LOWEST magnification is about the only one that is usable. I wouldn't use the Barlow at all.

There is a good website full of info about this HERE

Posted on Dec 31, 2010

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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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I have a Bushnell old school 78-9512 that is missing the diagonal mirror. Will I still be able to use the scope? and.. Is there any where I can get a piece by piece diagram of ALL the parts that come with...


Yes but the eyepiece will be in an uncomfortable position without the diagonal. You can buy these from many on-line retailers-- like this one--

http://www.telescope.com/control/accessories/telescope-diagonals

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The mirror you look into has come off


This is the diagonal mirror-- you can buy another diagonal but you will NOT like the price. We receive many complaints on this small "toy" telescope. Read this:

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

and here is a link showing diagonals:

http://agenaastro.com/optical-accessories/diagonals-prisms.html?SID=6bnpvdfu2v3g1fgvq170e0c8m0

Measure the hole in the telescope and buy the correct size diagonal.

Jan 11, 2011 | Vivitar (1607225) Telescope

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We have a eduscience telescope (bought several years ago) Our grandson found it our attic and states that it is missing a diagonal mirror. Where can I find one.


Measure the hole in the focuser-- diagonals come in 3 sizes:

.965, 1.25, and 2 inch sizes.

Your scope is probably a .965 contact Surplus Shed and see if they have one:
http://www.surplusshed.com/

or Telescope Warehouse:
http://shop.telescope-warehouse.com/

Nov 07, 2010 | Edu-Science (10166) Telescope

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The mirrored digonal eyepiece is not working


How is it not working? Is the mirror broken? You can buy another diagonal but it will cost $30-$40 ???

http://www.agenaastro.com/Telescope-Diagonal-s/62.htm

Aug 15, 2009 | Vivitar Optics

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My Meade Polaris 60EQ-D Telescope is missing the diagonal mirror.


Here is Meade's manual web page. Find your telescope on the page:
http://www.meade.com/manuals/index.html

Aug 09, 2009 | Meade Polaris 60EQ-D (36 x 60mm) Telescope

1 Answer

Cant adjust the mirrors to see any thing


Remove the eyepiece, and look down the focuser tube. The small diagonal mirror should have the full main mirror visible. If not, then adjust the diagonal mirror until all the main mirror is viaible, and the diagonal is centered. Then the main mirror is aligned until all the images viewed are concentric, with your eye being in the middle. That should do it.

Apr 18, 2009 | Galileo Optics

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Custom Rear view mirror


Hiya...ALL factory-installed rearview mirrors are installed with different wires due to options.
About 6 different rearview mirrors are installed with those options such as On-Star, light, compass, and those features which use different wires....THIS CANNOT be modified with different rearview mirror....**for example, the Equinox owner attempt to pull out a factory-installed base rearview mirror and put in different one that has compass/temperature built into the rearview mirror**

However, the wires are located inside the front headliner which requires removing the sunvisor (and possible removal of interior plastic trim part at the left/right ends of the windshield) prior to pull the headliner down, and a small metal philips or torx screw is used to secure the rearview mirror onto the bracket glued to the windshield.

The best solution is to leave the original factory-installed rearview mirror in place.

May 16, 2008 | 2006 Chevrolet Equinox

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