Celestron EdgeHD 11 Optical Tube Assembly - 91050-XLT type-spotting-scopes-and-accessories Waterproof Construction

Waterproof Construction

Celestron 2X Omni Barlow Lens - 1

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and autoguider

the solar Calcium K-Line is also within the pass band of the Baader Ultraviolet Venus Filter

Celestron EdgeHD 11 Optical Tube Assembly - 91050-XLT type-spotting-scopes-and-accessories Waterproof ConstructionAbout the Celestron EdgeHD 11 Optical Tube Assembly The EdgeHD is an aplanatic Schmidt Celestron Telescope designed to produce aberration free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off axis star coma, but also to give an astrograph quality flat focal plane all the way to the edge of the field of view. True Astrograph Quality Many optical designs that advertise themselves as