Sharpstar announces the newest addition to its Askar FRA series, the Askar FRA600/5.6. Following the excellent optical performance of its first FRA400/5.6
The Ritchey-Chretien telescopes are a variant of the Cassegrain telescopes but with hyperbolic primary and secondary mirrors that are designed to eliminate off axis optical errors.
130PHQ has a larger size than 107PHQ, with an aperture 23mm larger than 107PHQ. 130PHQ has a focal ratio of f/7.7 which is longer than 107PHQ’ s f/7, and a focal length of 1000mm.
The Ritchey-Chretien telescopes are a variant of the Cassegrain telescopes but with hyperbolic primary and secondary mirrors that are designed to eliminate off axis optical errors.
As a large aperture refractor, Askar 185APO fills the market vacancy, continues the high quality and cost-effectiveness of Askar APO series telescopes, and provides a new choice for astronomical amateurs.