Raytracing observatory telescopes
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Sub-aperture corrector for two-mirror systems
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Argunov–Cassegrain telescope - Wikipedia
Astronominsk
Klevtsov-Cassegrain Telescope book by John McBrewster, Frederic P. Miller, Agnes F. Vandome: 9786134114288
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TAL200K8.5 - BearOptics Warehouse
TAL 200K OTA Review › Nenad Filipović's Homepage
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