Lyceum B - Astronomy - Week 13 - Make a Telescope
- Feb 23, 2022
- 3 min read
Why Telescope Images Are Upside Down:
Ready to Observe: Why is it Upside Down? [Telescopes: Eyes On the Universe] - Nasa Night Sky Network - 2:15min
How Do Telescopes Work? | Earth Lab - BBC Earth Lab - 7:53min
Why is my image upside down? - Astronomy and Nature TV - 8:51min
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We are going to make a telescope.
This is for your home use.
You will need:
Black poster board for the tube, a directional compass, thick tape, like electrician’s tape.
For the lens:
For the eye piece, we will use a jeweler’s loupe. You can purchase these at camera stores or online.
For there 2nd lens:
The objective lens - you will need a 70mm convex lens with a power of 2 diapers that you can purchase from an optician. If possible, ask for it to be coated with an anti-glare solution.
The basic construction is going to look like this:
The jeweler’s loupe as the eyepiece at one end, which you will attach with electrician’s tape to the first tube to the frame of the loupe by cutting out small wedges around the end of the tube of black poster board in order to fit those pieces securely around the loupe frame without denting the rest of the tube.
You will then slip this first tube snuggly into the second tube of black poster board.
At the end of this second tube will attach the convex lens by making a paper ring to hold the lens in place.
Specifics:
Both tubes should measure 15 inches long. When you roll them up, the second tube should have an inside diameter to equal the diameter of the convex lens (about 2 1/2 inches wide), so it will hold it securely. You will have to test this out before the final cut. Make this tube first.
The first tube should be slightly smaller in diameter so that the end just fits inside the second tube for a snug fit.
We are going to now attach the lens to the ends of these tubes before we put the tubes together.
Cut out narrow wedges 1 inch long all around the end of the end that will go around the eye piece. Bend these resulting tabs around the jeweler’s loupe, keeping as even a circle as you can. Tape them down to the lens frame so it is firmly set.
Cut out a black ring with four tabs (1 inch long) sticking out - even spaced around the ring. The outer diameter of the ring should match the diameter of the convex lens.
Trace and cut out a black ring the same size as the ring you just made. Glue the convex lens to this ring. And then glue this ring to the middle of the rings with the tabs.
Fold the tabs so they will face outward and slide the lens into the open end of the tube. Glue the tabs so that the lens if recessed into the tube and the tab end are even with the end of the telescope.
Clean off the lenses and slide the first tube in to the second tube.
To focus your telescope, you slide the smaller tube inside the larger tube until the image is sharp and clear.
Try focusing on the Moon. The best time to view the moon is when it is at its half Moon phase.
Other Methods to Make a Handmade Telescope:
How to Make a Telescope - Instructables
How Do You Make a Telescope - HistoryHunters - Da Vinci Kids - 3:22 min
Make a DIY Homemade 11x Telescope - humza6951 - 8:44min
Simple Telescopes:
A more complex telescope:
How to make a refracting telescope:
How To Make a DIY Telescope to see the Moon for $20 - Mokso - 6:22 min
To see how difficult making a telescope from scratch materials:
How to (Almost) Make a Telescope from Scratch - How to Make Everything - 13.49 min
Videos:
Cycles in the Sky: Crash Course Astronomy #3 - 9:28 min
Professor Dave Explains - Star and Galaxy Formation in the Early Universe - 7:08 min
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