Astronomers that own a Celestron 127 SLT Maksutov/Cassegrain telescope or find adjusting the focus on their telescope a little tricky and would like to add hands free focusing to their optics. May be ...
A "selfie" taken by the James Webb Space telescope during the early stages of calibration process. NASA SHARE Focusing a six-ton, $10 billion space telescope isn’t as simple as turning the focus ring ...
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