Sky-Watcher BK MAK190 Newtonian OTA

The Maksutov-Newtonian from Sky-Watcher is just what astrophotographers and serious visual observers have been looking for. The Maksutov-Newtonian design provides large aperture apochromatic performance with exceptional field correction in a compact, affordable package. Compared to a similarly sized Schmidt-Newtonian, the Maksutov-Newtonian yields a sharper and more contrasty image. Naturally, the Maksutov-Newtonian is an excellent visual performer, too. Schott Glass Sky-Watcher Maksutov-Newtonian Series benefit from the inclusion of Schott glass being used for the positive front Crown element in the objective. Schott is the recognized world leader in glass utilized for precision optical lens systems, including medical instrumentation, and famous-brand camera lenses. Tube Materials The optical tube material is rolled steel, powder-coated reflective gloss black with gold fleck accent. The front and back cells are cast-aluminum painted white, or black. Precision 2" Crayford Focuser as Standard Optical focus is achieved by means of a mechanically ultra-smooth, backlash-free, precision 2" Crayford focuser-assembly. This focuser offers fine and ultra-fine focusing adjustments. Secondary Mirror Large 64mm secondary mirror increases field illumination for optimal use with larger CCDs. Secondary mirror obstruction by diameter 34% and secondary mirror obstruction by area 11%. The kit includes: Telescope optical tube Tube rings Dovetail plate 8x50 optical finder T-adapter