SKYWATCHER SKYMAX 127 MAKSUTOV-CASSEGRAIN OTASky Watcher 127mm 1500mm Skymax 127 Maksutov Cassegrain OTA The Sky Watcher 127 1500 Skymax 127 Maksutov Cassegrain OTA is a compact and powerful optical design that combines a front meniscus lens and two mirrors. As the optical tube is closed by the meniscus, the mirrors are protected from atmospheric agents such as humidity, dust and pollution that over the years degrade the reflective coating of the mirrors. The tube is compact but the focal length