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                  Specification : professional 400mm/16"inch large Rayleigh Criterion telescope with German heavy duty pedestal stand 
                                 
                                1. Optical System --- 
1) main ray route : Rayleigh Criterion optical system 
                                 
                                Aperture : 400mm/16"inch 
                                 
                                Focal length (f) : 4800mm/192"inch 
                                 
                                Field of view : 40' 
                                 
                                Faintest discernible stars : 14M 
                                 
                                2)  
bi-separated eliminating chromatic aberration refracting system 
                                 
                                Aperture : 150mm/6"inch 
                                 
                                Focal length (f) : 1900mm/76"inch  
                                 
                                Field of view : 5° 
                                 
                                3) Finder scope 
                                bi-separated eliminating chromatic aberration refracting system 
                                 
                                Aperture : 80mm/3.2"inch 
                                 
                                Focal length (f) : 500mm/20"inch  
                                 
                                Field of view : about 5° 
                                 
                                2. Mechanical System --- 
                                 1) Pedestal :  German tyle heavy duty pedestal stand 
                                 
                                2) Scope tube : close scope tube, there are multi-interfaces to different receiver in order to adapt to different demand 
                                 
                                3) Electric control system : adapt to SCM (Single Chip Micyoco) control system with stepping electric  
                                 
                                Speed technical parameters as follows - 
                                 
                                Speedy conduct : 60°/minute 
                                 
                                Slow conduct : 1-3°/minute 
                                 
                                Tiny conduct : 1-3'/minute 
                                 
                                Lasting conduct : 15'/minute | 
                 
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