Gather all of your supplies so everything is nearby when you begin making your telescope. Place the lenses in the cardboard holders. The long focal lens goes into the ring with a wider diameter. make it a larger in diameter by using cardboard rings cut from the toilet paper roll . Squeeze each lens into the center of each cardboard ring. Tape the second lens neatly to the end of the paper towel tube. Duct tape. Allow the glue to dry. Cardboard Telescope: How to make your own cardboard telescope. That’s it! 3. We wanted to make an “E” for our captain, but you could make polka dots, stripes, or even a skull and crossbones! just make the diameter enough for the chart to be able to slide in and out of the telescope … Step 4 Pull your design up off of the cutting mat and place it on your telescope. 2. I'm … Tissue paper (optional) 2 cardboard tubes, diameter wider than the lens on the magnifying glass with a handle. Look through the eyepiece and point the other end of your telescope at a distant object. Slide the two tubes in … Check that both lenses are perfectly even with the cardboard. Apply a small amount of white glue to the outside edge of each lens. When I set out to build a portable telescope, known as a Dobsonian telescope, the first step had me stymied—where do you find 6 ft of 8-in.-dia cardboard tubing?. Now your telescope is ready to be used! Insert the empty end of the paper tube into the cardboard tube. Lay a strip of tape down onto the cutting mat and carefully cut your design with the craft knife. you will need > cardboard > duct tape > 2 mirrors 1 big and 1 small > 2 lenses 1 big and 1 small Just like in the previous steps cut a 10 cm long piece of white and black sheets and roll it along the circumference of the bottle neck. Now it’s time to decorate!
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