Celestron - 11" EdgeHD (Optical Tube) ASIAIR Pro You can record the helical

You can record the helical error so it's automatically corrected in the future

The PDF can be downloaded here

saving you hundreds of euros

Controller has been designed to support up to 12 Amps of total current

clean star profiles—even around the brightest stars in the sky

Celestron - 11" EdgeHD (Optical Tube) ASIAIR Pro You can record the helicalThe EdgeHD optics (Edge High Definition) combine the compact design of a Schmidt Cassegrain with significantly improved imaging at the edge of the image. This optical system not only offers the properties of astrographs, but also produces completely undistorted, sharp images right up to the edge of the large visual and photographic field of view. Not only is the coma outside the optical axis corrected as with other "coma free" optical designs