Celestron Origin Mark II Intelligent Home Observatory Cooled DSO Camera make sure you selected the

make sure you selected the correct adapter when placing the order

Eliminates field curvature

336mm(including the photographic adapter as dew shield contracted）

It is also more sensitive to red

Celestron Origin Mark II Intelligent Home Observatory Cooled DSO Camera make sure you selected theStargazing and Astroimaging Redefined: Celestron Origin is an intelligent, all in one home observatory that captures stunning views of faint, deep sky celestial objects and delivers them to your phone or tablet. The images you capture in seconds look better than what youd see in the eyepiece of a much larger telescope under much darker skies. Revolutionary RASA Optical Technology: Origins patented 6 Rowe Ackermann Schmidt Astrograph (RASA) optical