The Latest upgrade in the Popular LX90 Series includes Meade's Advanced Coma Free (ACF) optics. The LX90-ACF optical system delivers wide, coma-free images with pinpoint stars all the way out to the edge of the field. Now the amateur can have this amazing RC like performance for the price of an ordinary SC. The LX90GPS can do more than track satellites. It talks to them as well. Turn it on and the built-in Sony GPS sensor immediately determines your precise date, time and location. AutoAlign then uses this info to align your scope for a tour of the most spectacular sights in the universe. AUTOALIGN: Telescopes with Meade's new AutoAlign come pre-aligned. They are smart scopes that know the night sky right out of the box. AutoAlign picks two fail-proof alignment stars for you and places them right in your viewfinder. Just center them to fine tune your alignment and the wonders of the universe are at your fingertips. Meade individually figures their water-white corrector lenses and Pyrex primary and secondary mirrors for superior light transmission, temperature stability, smoothness and correction. OVERSIZED PRIMARY MIRROR: Only Meade manufactures their primary mirrors in diameters larger than their listed aperture (e.g. the diameter of the 8" LX90's primary mirror is actually 8.25").This additional 1/4" yields a wider, fully illuminated field -of-view, and allows you to see t he light other telescopes leave behind. SLE