Back-Focus 101: Celestron EdgeHD: C9.25, C11, and C14 Basic Back-Focus for DSLR and CCD/CMOS Cameras
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Back-Focus 101: Celestron EdgeHD: C9.25, C11, and C14 Advanced Back-Focus with the Celestron OAG
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Back-Focus 101: Celestron 8" EdgeHD SCT (no reducer)
20:00
Astrophotography With A C11 Telescope
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Backfocus
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Celestron's C14 Edge HD - A Deep Dive!
11:53
Back-Focus 101: The Petzval Lens ft. William Optics RedCat51
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My Telescope Family: Celestron EdgeHD 9.25
12:07