TPO 6" f/6 Newtonian Reflecting OTA Telescope

The 6-inch f/6 Imaging Newtonian Telescope OTA and Focuser by Third Planet Optics (TPO) has optics carefully designed for wide field views and spectacular imaging. Get the performance of a Ritchey Chretien without the cost. Capture images with a DSLR, small webcam or all the way up to a large sensor CCD camera with this inexpensive yet effective Newtonian. Optics The optics on all TPO Imaging Newtonians consist of a parabolic primary mirror and an elliptical secondary, or diagonal. Made from B270 white water optical crown glass, a 91% aluminum coating is applied, and then over-coated with a layer of quartz for the ultimate in durability.  Collimation The primary mirror cell is very sturdy, and has six collimation knobs that can be adjusted by hand with a push or pull of the knob. There's a perfectly centered dot in the middle of the primary so you know exactly where your laser collimator should point.  Balance A single speed Crayford-style focuser rounds out this package. There is also