Apertura 10" f/4 Imaging Newtonian OTA - Truss Tube Design - 10F4TN

Apertura 10" f/4 Truss Tube Imaging Newtonian OTA The Apertura 10" f/4 Newtonian reflector, with a focal length of 1016 mm, is a great choice for deep-sky wide field imaging, especially with the addition of the optional Apertura Coma Corrector! The fast f/4 primary optics are diffraction-limited and the secondary mirror has been optimized for full field photographic illumination. The parabolic primary mirror has an aluminum coating with 96% reflectivity and a top coat of quartz for protection. Both the primary and secondary mirrors have light shields built into the inside of the truss tube assembly to keep ambient light from bouncing off the mirror and reducing contrast. The sturdy 2" Crayford focuser has linear bearings that result in a rigid draw tube and virtually no flexure. You can easily attach a 35mm DSLR camera or large format CCD/CMOS imaging camera and be confident in the mechanical build of the Apertura 10" f/4 Truss Newtonian. The big carbon fiber truss tube OTA is 32.25" l