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Sky-Watcher's 7.5" f/5.3 Maksutov-Newtonian Telescope
features a hybrid optical path that combines the parabolic mirror of a
Newtonian with the front corrector plate of a Maksutov to create an
optic that corrects for spherical and chromatic aberrations, and comas
across the entire field of view. An added benefit of the front corrector
plate is that the secondary mirror can be attached to it, removing the
struts and supports found in traditional Newtonians and eliminating the
diffraction spikes they cause which can degrade the image. The resulting
views through the scope are bright and clear with virtually no
distortion across the entire field of view with true color rendition.
scope is equipped with a 2" Crayford-style focuser, instead of the more
common rack-and-pinion, which uses a steel rod held tightly against the
drawtube to provide a toothless friction system that eliminates
backlash and enables ultra-fine, precision focusing with its 10:1
reduction micro-focusing knob. Employing a 2" drawtube allows the use of
larger eyepieces and accessories.
While there is no mount
included, a cradle-ring assembly is provided. It clamps over the optical
tube and lets the user adjust the orientation and position of the scope
relative to the mount to optimize viewing comfort and balancing, while
avoiding interference with other equipment. A stainless steel
Vixen-style dovetail plate makes it compatible with any alt-az or
equatorial mount with a Vixen-style saddle, and a 1/4"-20 stud on the
top of the cradle ring assembly enables a camera to be piggybacked onto
the scope for wide-field photography.