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Post by howie1 on Jun 16, 2017 11:19:27 GMT
Interesting video how to shoot Schlieren photography using scope mirror to focus an LED light. YouTube channel Veritasium demonstrates the effect ...
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Post by Rick in NWArk on Jun 16, 2017 17:34:34 GMT
Coooooool!
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Post by Dragon Man on Jun 17, 2017 14:15:35 GMT
wow, that is excellent! Have to pull my 12" dob apart
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