How to Make a Telescope with cardboard

Before showing you the process to make a telescope ... first let you guys know that what is telescope?
A Telescope is an instrument which makes a far away object to look closer.Below article will show you the steps for makeing a telescope with pictures....

This is the complete look of your telescope after you complete.

Follow the Steps :-

1.) Collect the Material required :-

a.Two cardboard tubes around 12" each; one should slide into the other(Get two cardboard tubes with one that can slide in and out of the other.)
b.Two lenses of differing focal length(For your primary lens a convex lens at least 50 millimeters in diameter and a focal length of between 200 and 300 millimeters. For the secondary lens you get a convex lens that is between 10 and 25 millimeters wide with a focal length of less than 75 millimeters)
c.Two small pieces of corrugated cardboard.
d.Scissors, pencil, razor knife, paint and glue.

2.)

Put a lens down on the square of corrugated cardboard and draw a line around it. Do this whole process for both lenses. (make two of these)








3.)

Using an razor knife cut the circle out. You can use scissors but it is rather difficult because you will tend to bend and distort the cardboard. Try to cut the circle so the hole is just a tiny bit smaller than the lens. Maybe about 1/32 of an inch
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 4.)

Pop your lens right into the cardboard. Because of the thickness of the cardboard you should be able to squeeze the lens right in there and it will hold tight. If you have trouble or it doesn't hold tight then just use a little bit of glue and let it dry
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5.)

Now, with a pair of scissors trim the cardboard ring so it is the same diameter as the tube. Remember that you have two tubes and each one is a different size because one slides into the other. Trim the ring with the long focus lens so it is the same size as your thicker outer tube. And trim the ring with the short focus lens so it is the same size as your thinner inner tube.





6.)
Now glue each ring onto its respective tube.










 7.)

Slide the thinner tube into the thicker tube and your telescope is complete. Enjoy!!!!