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Showing posts from December, 2011

Cardboard Telescope (Kepler)

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Materials: • 3'' dia. x 8'' cardboard tube • 1.5'' dia. carbboard tube, one 8'' length (the eyepiece tube) and one 1.25'' length (the eye piece cuff) • 2.9'' plastic meniscus objective lens (we get ours from allelectronics.com, see CAT# lns-16) • 19.5mm DCX eyepiece lens (we get ours from sciplus.com, see item # 68095 ) • 3-6 foamcore spacers 3/4''x3/4'' (we used the scraps from the tube spacer fins) • 2''x 2'' mat board or foamcore eye piece holder (black works the best as it doesn't reflect light) • 3 foamcore spacer fins, two 3/4'' x 6'' and one 3/4'' by 8.5'' (making the fins a bit larger than 3/4'' wide is a good idea as you can always make them smaller and a tight fit is desirable) •Yarn Tools: For prep: • Utility knife • Straight edge • Optional: a band saw, makes quick work of cutting the tubes to size, a 3/4 leather punch can be used to put