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Post by Paul Greenhalgh President on Nov 6, 2014 18:21:15 GMT -8
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Deleted
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Post by Deleted on Nov 6, 2014 20:43:35 GMT -8
Did Ernie make a 10 inch as well?
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DollarshortAndaDaylate
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Post by DollarshortAndaDaylate on Nov 8, 2014 18:09:32 GMT -8
It would figure...
Very nice looking unit!
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Post by Deleted on Nov 11, 2014 21:21:56 GMT -8
The reason I asked was that I remember looking through one of Ernie's scopes. His home figured mirror was so good that the focus point was dead on -- there was no guessing finding the best focus point -- it was either focused or it wasn't.
Ernie was a retired structural engineer. He was so good with understanding the math that he'd look at the key equation in Berry's How to build book (1st edition) and know that it was in error by a factor of two. Me, it was all I could do to just plug in the numbers and crunch them. (not analyze the equation) It was so much easier when the first computer programs came out to crank out a finished Texereau Test Data Sheet with each new set of mirror figuring measurements.
Still miss the guy. He was the only one I knew that was also interested in splitting Gamma Virgo as the double got tighter and tighter. We were checking it out when it was down to 1.8" apart. (now it's getting wider)
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