Add a Reticule to a Telescope Eyepiece

A reticule (or reticle, or graticule, or whatever you want to call it), is the cross hair you typically see in a telescope's finder scope. In order to ensure the finder scope and main scope are aligned it's handy to have an eyepiece with a reticule. However, if you're like me, and don't have a hea...
By: ClockworkLemon

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from Instructables: exploring - technology - robots http://ift.tt/1Hg9lKJ

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