Fast f/8 Advanced Coma-Free (ACF™) optical system with high-contrast baffling that assures crisp, pinpoint imaging to the very edge of the field. The all-new optical tubes feature an internal Crayford-style, zero image-shift focusing system with a two-speed, 7:1 control.

Ultra-High Transmission Coatings (UTHC), oversized low-expansion borosilicate primary mirror with mirror-lock, Schott Borofloat glass corrector plate, diffraction limited optics, Losmandy-style dovetail, and dust cover. As used on LX850-ACF telescopes.