“Another a 200 mm modified Cassegrain telescope. The images are made from the first sample we unpacked and show smooth optics with a spherical correction of around 1/6 wavefront PTV. After testing an second sample we found again smooth optics, but about 1/4 wavefront spherical correction. This shows there are definitely some variations in these systems . The optics are smooth - compared to the lower quality scopes we see in most mass produced Schmidt Cassegrains.”

Markus Ludes (APM-Telescopes)