How to make an astronomical telescope

A telescope is an optical instrument that makes distant objects appear magnified by using an arrangement of lenses or curved mirrors and lenses, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.

The history of the telescope can be traced to before the invention of the earliest known telescope, which appeared in 1608 in the Netherlands when a patent was submitted by Hans Lippershey, an eyeglass maker. Although Lippershey did not receive his patent, news of the invention soon spread across Europe.

This project is great for learning the concept of reflection and refraction of light.

Once you will learn the basics, you can experiment with different body styles and designs to make your telescope more powerful. Make STEM education fun!

Materials Needed

The best thing about this project is that you can get most of your “telescope” parts from the trash.  You can use many recycling items to create a body of the telescope. Be creative!

For this project, you will also need the following materials:

• Convex lens (D: 7.5cm, F: 35cm)
• Eye Piece lens (D: 2.2cm, F: 35cm)
• cardboard
• PVC pipe
• black card sheet

Alternate lenses

• Objective lenses/ Primary lenses
  • lens focal length 45- 50 cm/ 400-550 mm
  • Diameter: 5.2cm / 52mm
  • Material: Glass
• Eyepiece / Secondary lens
  • Focal length 4 cm/ 40 mm
  • Diameter: 2.5cm / 25mm

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    Telescope Objective/ primary lens and Eyepiece/ secondary lens available in Pakistan (sciencestore.pk)

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Video Tutorial

Note: Lenses are available at sciencestore.pk

Required Tools:

• Scissors
• Pen cuter
• Tape

Step 1:

Make a circle on the cardboard with the help lens

cut the marked circle

Make another  circle on the same cardboard with the help of PVC pipe in the centre

then cut the marked circle to make a doughnut shape. Make two doughnut shapes pieces

Step 2:

Take a black chart piece of 25cm" wide and 60cm" length

Step 3:

Placed a lens on a chart sheet and roll it

Step 4:

Insert both the doughnuts shape cardboard inside the chart sheet roll. Make sure both are at a small distance from one another

Step 5:

Cut PVC pipe into two pieces. Make sure one PVC pipe length is 3cm and another length is 17cm

Step 6:

Placed an eyepiece between 3cm and 17cm PVC pipe with the help of a tape

Step 7:

Insert the PVC pipe in the chart sheet roll. Now your astronomical telescope is ready to test

How it works

An astronomical telescope works on the principle that when an object to be magnified is placed at a large distance from the objective lens of a telescope, a virtual, inverted and magnified image of the object is formed at the least distance of distinct vision from the eye held close to the eyepiece.

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See Als:

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How to make telephone with cup

Telescope Construction step by step in photos

Build your own Telescope دوربین (Video Tutorial Urdu)

Build A Simple Galilean Refracting Telescope