Officina Stellare RiFAST 500 F/3.8
Diffraction-limited over a wide and flat field, the RiFast design will push any camera to its limits… and will do it FAST! The extraordinary f/ ratio of the Officina Stellare RiFAST 500 allows a higher productivity per night, a significant factor for surveys, SN search, asteroid control, and many other fields of modern astronomy.
The central obstruction is about 50%, but still smaller than similar designs, that simply can’t compete under any point of view. The visual contrast is very good, thanks also to the special ultra-dark paints we use.
The corrector group is very close to the focal plane, so chromatic aberration is undetectable.
Main features are the three element corrector placed near the focus with two aspherical elements, an incredible stable mechanic to make collimation easier and a complete series of accessories for a complete upgrade. Why place the corrector so close to focus position? Simple: to give the best result possible in terms of overall correction, completely absence of chromatic aberration and best RMS spot radius. Optional 1.5x extender and 0.78x reducer are designed to work in a perfect symphony with the integrated three elements corrector, to provide also a better performance.
Collimation is stable as it had ever been before, thanks to a new mechanical design, improved with bigger apertures. Temperature changes will not affect optical stability. Every RiFAst is tested under the sky in real condition in our factory before shipping and comes perfectly configured with customer needs and collimated as well.
Secondary mirror is motorized for focusing (optional for 400mm model), leaving the imaging train completely screwed to the backplate, a good solution for heavy cameras and accessories. Is also possible to set up the tip-tilt.
Remote observers can upgrade their RiFAst with primary mirror shutters to avoid moisture deposit on the telescope’s mirror when not in use and OS Bus advanced electronic to control every function remotely.
You will never find a better and faster astrographer in this class. It’s also versatile: equipped with a 0.78x reducer or a 1.5x extender, will expand its functionality. It’s not only a telescope, but three in one, all with the amazing optcal performance promised from Officina Stellare and our Master Optician Massimo Riccardi.