How to Make a Telescope

How to Build a Telescopes, which are simple and straightforward to use

A telescope is, at its most basic level, a device that tends to make a distant thing appear closer. To achieve this, a telescope contains a component objective lens or the basic mirror that gathers light from a faraway target and gets it to a focus. A second component, the eyepiece lens, amplifies the picture and delivers it to your eye. This guide will walk you through the whole process of building a tiny refractor telescope. Tips and instructions for novices on how to develop one are provided below.

Constructing a telescope is a really satisfying activity since it encompasses a wide range of skills. The pleasure of creating something is really the first accomplishment for you. The second benefit is the pure joy of exploring the cosmos with what you created. You’ll also save money while understanding telescopes and making things. Check out my Amazon page for books that will guide you through the process of building your telescope.

The most basic telescope you can build is as explained down below

You may construct a variety of various sorts, the simplest of which is made up of only two lenses. The objective is the larger lens, while the eyepiece is the narrower lens. One lens is held near your eye, while the other is held at arm’s length. By bringing your arm toward you, you may change the distinction between the two. It’ll all come into perspective at a certain moment. That’s all there is to it. You’ve got a telescope, right? You may now improve it significantly by forming a cylinder around it. Grab two cardboard tubes, each of which can be inserted and removed from the other. One lens is mounted solely on a single tube, and then the other lens is mounted on the other tube. To locate the focusing, place one tubing into the other and push them in and out.

You may acquire cheap lenses from a number of surplus and internet businesses for a few dollars apiece. I suggest having a convex lens with a diameter of at most 50 millimeters as well as a maximum aperture somewhere between 200 to 300 millimeters for the primary lens. For the secondary lens, I propose a convex lens having a focal distance of less than 75 millimeters and a focus length anywhere between 10 and 25 millimeters.

There are various things you may do to improve the performance of this telescope. To begin, you may create a tube out of a more sturdy material than cardboard tubes. Additionally, this sort of telescope inverts pictures, making everything look inverted, which is fine for seeing the sky but makes observing things on the ground quite difficult. You may avoid this by employing a concave lens instead of a convex lens for the eyepiece.

The lenses may be purchased separately from internet surplus merchants, and various upgrade kits include all of the essential parts to build this type of telescope. For educational and group usage, they are also available in bulk packages. A kit like this usually includes everything you need to create 10 or more telescopes. Let’s get started on the lesson and see how to create this telescope.

So here are the specific lenses you’ll need for this project are as follows:
LENS DBL CONVEX 3.75CM DIAM 30CM FL (This is the objective or long focal length lens)

LENS DBL CONVEX 3.75CM DIAM 5CM FL (This is the lens I used for the eyepiece, the short Focal length lens)

If you’re looking to build a larger telescope for a new project. I’ve begun work on a 4 1/4″ reflector telescope. To test it all out, I created a makeshift tube setup. It worked perfectly fine. I’m finally finished with the tube assembly. You can keep track of the project here: How to make a Newtonian Reflector Telescope


Cardboard Galilean Style Telescope Building Kit

As an enjoyable learning aid, this kit may be sent assembled or even in pieces for young hands to construct. It consists of (2) telescoping tubes, (1) positive lens, (1) negative lens, (2) end caps, and an instruction sheet are included in the set. The telescope takes around five minutes to put together and is ready to use. No adhesive is required, and the kit may be disassembled and rebuilt. The view is right side up with a magnification of about 3X. Suitable for those aged ten years and above.

Make Your Own Refractor Telescope Kit

Participants assemble a hand-held, 10-refractor telescope out of kit items in minutes and begin seeing the stars like Galileo did in 1609.

Assembly guidelines, viewing recommendations, and instructions on how to measure the focal length and compute magnification power are included in the kit, as well as assembly instructions, tubes, and end caps.

Galileo’s Telescope Kit – Teacher Demo

Inspire eager stargazers to build, decorate, and experiment with their 16-power refracting telescopes—1 set of materials with instructions and activities.

Refracting Telescope Single

Experiment with every component of a basic refracting telescope to observe how the lenses function when assembled without the use of an optical bench. The initial telescopes built by Galileo lacked accuracy and clarity. Despite this, he made incredible discoveries with his primitive devices. Students may build a telescope comparable to Galileo’s in this basic experiment. Try out the telescope to see how it compares to a pinhole camera. View astronomical photos that have been reversed. Calculate the magnification strength. Determine a lens’ focal length. Take a peek at how the moon seemed to Galileo. It can be ordered at a ten-pack bulk rate.

Investigating & Building Refractor Telescopes Kit

This is a fun approach for your children to learn about how concave and convex lenses bend light to create actual and virtual pictures. Students determine the focal lengths of the lenses and learn how lens pairs may be used to create two distinct types of refracting telescopes. Students compute the magnification capabilities of their telescopes using the focal lengths they’ve established.

Instructions, exercises, and supplies are included in this kit to build eight hand-held refracting telescopes (4 Galilean and 4 Keplerian), each with its own 444-mm objective lens as well as a 50- or 150-mm focal-length eyepiece lens.

It’s worth noting that has a good small kit. which you may test out, and it appears to be rather nice and contains the lenses

Telescope Kit

3X Refractor Telescope Kit – This educational kit contains everything students will need to build a 3X power telescope based on Galileo’s original design from 1690. — The 18″ scope is easy to build and takes less than an hour to finish. The telescope, if completed, provides widefield viewing and simple zooming focus, with just enough power to see craters on the moon, Jupiter’s moons, and numerous stars that are invisible to the human eye. — The set comes with an instruction booklet, a star as well as planet indicator, and activity cards.

Getting A little more involved with your telescope making

If you’re looking for a little more of a challenge, think about building a reflector telescope. This kind employs a mirror as the illumination gatherer instead of a big objective lens. A reflector may be particularly cost-effective because of its excellent price-to-performance ratio. Because mirrors are less expensive than lenses, you can obtain a considerably larger and more powerful telescope for a comparable sum of money.

Consider constructing a Dobsonian telescope if you do have some carpentry or metallurgy skills and would like to take on a challenge that is well within the capabilities of a hobbyist. A parabolic mirror collects light in a Dobsonian telescope, and also most Dobsonian constructors buy the mirror first, then construct the mounting for it. The primary notion behind this sort of telescope is that it would be simple to construct and operate. It’s just a revolving platform with a telescope tube connected to it. And this style of instrument has grown in popularity due to its ease of use and construction. One of the most significant advantages is that, since they are so inexpensive to construct, the extra money could be spent on bigger mirrors, which may make them extremely impressive in terms of their capacity to view items in the night sky. If you’re going to make this sort of scope, you should start with a mirror that’s approximately six and eight inches in diameter.

Building a telescope, whether a lens or a reflector, is a wonderfully satisfying hobby that you may appreciate for a lifetime. And once you get started, you could discover that you’ve gotten hooked and are constantly seeking ways to make them larger and better. Building them is half the joy for some folks. My plan for building a telescope is as follows: I’ve started a project to build an 8″ reflector telescope. Here’s where you can stay up with the project and understand how to create your own: Making an 8″ reflector telescope.

I also have a website on with books that will help you build your own telescope. The book is known as Making & Enjoying Telescopes: 6 Complete Projects & A Stargazer’s Guide. This is a newer book on telescope building (it was published in 1995), and it takes a unique approach to the subject by detailing six various telescope projects, ranging from a large Dobsonian to a tiny rich field telescope. It’s a fantastic book, and I’ve written a more detailed review of it here. Book Review of Making & Enjoying Telescopes