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Indeed a great man has gone. Brought the larger apertures affordable. Thanks to him many people can use a 20, 30 or 40cm or even larger aperture for an affordable price in the backyard.
And the first Dobsons ever build did exist long before John Dobson was even born: the 1.20m telescope of William Herschel and the 1.80m telescope of Lord Rosse. They were of virtually the same design.
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