Apertura 6" f/4 Imaging Newtonian OTA - 6F4N

Apertura 6" f/4 Imaging Newtonian OTA The Apertura 6" f/4 Imaging Newtonian OTA is a great introductory telescope that has everything you need to start observing! The OTA is 22.5" long and made of rolled steel for added durability. The diameter is 7". The optical tube assembly is painted white. This 6" f/4 Newtonian from Apertura has an extended tube in front of the focuser that serves as a built-in light/dew shield, and it is equipped with diffraction-limited optics. The OTA length forward from the focuser has been extended, increasing contrast by keeping stray light from hitting the secondary mirror. Included Accessories The rigid 2" Crayford focuser has linear bearings that create a sturdy draw tube and almost no flexure. It is different from standard Crayford focusers found on most reflectors. With this focuser, there is less wear on the focuser draw-tube, less flexure, and more rigidity due to design differences that support the drive rail and draw-tube along the length of trave