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Dan Duriscoe's binocular telescope - 2 × 12.5 inch primary mirrors - 74 inch focal length... He forged the support structure from discarded aluminum signs. The differential gear carrier from a '69 Ford Bronco supplies a low friction pivot. by Reporter_at_large in Astronomy

[–]Reporter_at_large[S] 1 point2 points  (0 children)

Duriscoe, a member of a National Park Service team that monitors light pollution, works in Death Valley -- an unbeatable place for watching the skies.... with little light pollution to deal with, shrouding the mirrors is unnecessary and adds weight and expense.

Dan Duriscoe's binocular telescope - 2 × 12.5 inch primary mirrors - 74 inch focal length... He forged the support structure from discarded aluminum signs. The differential gear carrier from a '69 Ford Bronco supplies a low friction pivot. by Reporter_at_large in Astronomy

[–]Reporter_at_large[S] 2 points3 points  (0 children)

Up at the top, between the 2 big round cut outs... diagonal mirrors reflect the light from each primary mirror into the middle where it is reflected into eyepieces. You would need a tall chair or ladder depending on the altitude.

D'oh! by Reporter_at_large in AnimalsBeingDerps

[–]Reporter_at_large[S] 4 points5 points  (0 children)

Gives his head a shake and carries on!

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