Thread: [WITHDRAWN] 110mm Bintel Refractor and mount
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Old 29-01-2024, 09:36 PM
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MortonH
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Quote:
Originally Posted by IanL View Post
Na its not 90mm the circunference is more than 110 on the OTA

OTA 3 Feet in length
Circunference tube 28.6cm =110mm
28.6cm divided by Pi gives a diameter of 91mm.