Celestron EdgeHD 8" Optical Tube Assembly (OTA) (91030-XLT) Ultima In this case

In this case

you won’t have to worry about amp glow even when using high gain

and ergonomic aspect was rethought to achieve reference-standard performance for any visual application

narrower apparent field eyepiece with the benefits of higher power and darker sky background

Celestron EdgeHD 8" Optical Tube Assembly (OTA) (91030-XLT) Ultima In this caseEdgeHD is an aplanatic, flat field Schmidt Cassegrain telescope that produces 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; it also provides 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 "astrographs" actually only produce pinpoint