Sub-aperture lens correctors for single-mirror telescopes
TELESCOPE EYEPIECE
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Sub-aperture lens correctors for single-mirror telescopes
Lens Basics
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Full-aperture meniscus corrector: Bowers/Maksutov camera
Maksutov-Cassegrain telescope
2pcs Positive Meniscus Lens, 23 mm Diameter, 30 mm Focal Length ...
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