Photron 14 inch Truss Tube Ritchey-Chretien

Coma free, chromatic aberration-free, spherical aberration-free optics 14" (355mm) optical aperture 2848mm focal length f/8 focal ratio Fixed primary Low thermal expansion quartz mirrors 3" Dual-speed Crayford focuser Optional iOptron Electronic Focuser 2X 1" (25.4mm), 1X 2" (50.8mm) focus extension rings Cooling fan battery holder Primary and secondary mirror covers   Description The Photon™ line of Ritchey-Chretien astrograph telescope has been expanded with the addition of four new truss tube models (10,12,14 and 16 inch). Designed for today's astro imager, Photron™ truss tube RC telescopes deliver a sharp clear image from one edge to the other. The truss tube models are designed to carry on our long standing reputation for creating and manufacturing solid, stable, accurate tracking mounts, in a high quality RC astrograph telescope.iOptron® Photron™ truss tube RC telescopes feature low thermal expansion quartz primary and secondary mirrors with highly reflective dielectric coati