Skywatcher 190mm F/5.3 Maksutov-Newtonian Telescope


This telescope features a completely flat-field, coma-free optical system that's optimized for CCD and DSLR cameras. The 190mm (that's 7.5") Maksutov-Newtonian optics provide tremendous resolution in a fast f/5.3 design. The primary mirror is figured from low-expansion Pyrex® glass, and the front meniscus lens from quality BK7 Schott glass, fully multi-coated for maximum light throughput. The images rendered are truly spectacular, with pinpoint stars from center to edge of the field of view, rivaling the very best premium apochromatic refractors, which cost thousands more.

The 37.5" optical tube is made of thick 1.5mm metal to ensure durability and to hold collimation. The ivory-tone enamel has a classy, subtle sparkle to it, like the finish on a fine automobile. Inside, five knife-edge baffles eliminate internal reflections to provide exceptional contrast. The machined aluminum 2" Crayford focuser offers smooth motion and secure support for CCD and DSLR cameras and additional accessories. The included 2" and 1.25" adapters feature non-marring brass compression rings.

Unlike some expensive astrographs that are limited to photographic use only, this Mak-Newt performs just as admirably with an eyepiece as with a camera. With the included focuser extension adapter, visual astronomers can enjoy the sharp, high-contrast views that only a well-made instrument can deliver.

Specification:

Optical diameter -190mm
Focal length - 1000mm
Focal ratio - f/5.3
Optics type - Spherical
Resolving power - 0.60arc*sec
Limiting stellar magnitude -14.1
Finder scope - 9x50
Focuser - 2" Crayford
Secondary mirror obstruction 58mm
Secondary mirror obstruction by diameter 29.5%
Secondary mirror obstruction by area 8.7%
Tube material - Steel
Length of optical tube - 37.5 in.
Weight, optical tube - 22.0 lbs.
Additional included accessories - 2" to 1.25" eyepiece adapter & extension, tube rings