[Wavytone]

A cheap and nasty way to undercut SCT prices - and the target market is noobs who don’t know what happens to exposed mirrors after a couple of years.

The whole point of a classical cassegrain is to be a planet killer, primarily for visual, which implies a CO well under 30% and ideally 24%. Yet they’ve crippled these with a big CO, 33%, and with an open tube the coatings will have to be cleaned and recoated from time to time.

A cheap SCT is a better buy - the OTA is closed by the corrector and the mirror coatings will last far longer.

And with similar CO to SCTs I’d expect the image quality to be much the same.