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There are usually 3 adjusting screws on the front of the telescope over the secondary mirror. You point the telescope at a bright star and then defocus it this forms a donut-like image in the telescope. If you center the "doughnut" in the middle of the telescope view you will see that the "doughnut" has the dark area in the middle off center (If the scope is not colminated properly). What you want to do is move the doughnut to the edge of the telescope in the direction where the dark center is "out of center". Now you will tighten one of the three screws in the front. The way to figure out which screw to adjust is by placing your finger in front of the scope where the doughnut is out of center. You will see a dark line in the doughnut image where your finger is and it will actually be pointing to one of the three screws in front - that screw needs to be tightened. You repeat these steps until when you put the dougnut in the center view of the telescope and see a perfect looking "doughnut" with the dark part centered perfectly.
What else can I help you with?
What type on telescope in the south African large telescope?
it is a reflector telescope
What type of telescope is the Webb telescope?
A Cassegrain reflector
What is the largest telescope in India?
Better u ask who found that telescope
What kind of telescope focuses light through a transparent lens?
An optical telescope (as distinct from, say, a radio telescope). It's possible that the answer was intended to be "a refracting telescope" but reflecting telescopes use lenses as well.
What is the name of the orbiting space telescope launched in 1990?
The Hubble space telescope.The name of the telescope launched into space in 1990 is Hubble Space Telescope.
What type of telescope is hubble space telescope?
It is a reflecting telescope
Why are telescope eyepieces an important part of any visual telescope?
Telescope eyepieces are important of any visual telescope. It is the main part of the telescope and is what determines how the object will look like through the telescope.
How do you spell telescope?
Telescope.
What type on telescope in the south African large telescope?
it is a reflector telescope
Is theHubble telescope is an optical telescope?
The Hubble Space Telescope has a number of instruments, but the primary one is an optical telescope.
Did Isacc Newton create the telescope?
No. A Dutchman created a refractive telescope. Newton improved the telescope by creating the Reflective Telescope.
What was the early telescope called?
a telescope.
Who the telescope?
I accidentally the whole telescope.
Who founded telescope?
mr. telescope
What type of reflector telescope is viewed from the same position as the refractor telescope?
The Newtonian Telescope.
When could a radio telescope and light telescope be used together?
To make a tv telescope
What is the adjective of telescope?
The word 'telescope' is a noun.Example: "I don't know how to use a telescope."
