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Glossary > Telescopes > Optics > Type of build > EdgeHD-Cassegrain

Glossary | Telescopes | Optics | Type of build | EdgeHD-Cassegrain

Celestron’s aplanatic EdgeHD optics revolutionized astroimaging.

EdgeHD Optics

EdgeHD Optics

EdgeHD optics combine the compact design of a Schmidt-Cassegrain with a noticeably improved image at its edges. This optical system produces completely undistorted, sharp images right to the edge of the large visual and photographic field of view.

Not only off-axis star coma is corrected this way, but also field curvature! No additional corrector is required as an accessory for astrophotography. This puts the higher price of the EdgeHD in perspective when compared to classic SC optics.