| What
                is a "Schmidt-Cassegrain"? | 
               
              
                
                    
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					    The Schmidt-Cassegrain, invented by Bernhard Schmidt, is similar
					  to the Cassegrain. In this system the parabolic primary mirror is replaced
					  by a spherical mirror, which introduces spherical aberration. This is
					  corrected by a Schmidt corrector plate. This type of telescope has some
					  of the advantages of the refractor (long focal length) and some of the
					  advantages of the reflector (low cost for larger apertures). | 
                     
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                         In
                        general, there are two kinds of telescope systems. One
                        is the Optical Telescope. This is our main manufacturing
                        base. The other is the radio telescope, which is used
                        for National & Scientific research . We manufacture
                      only a few of these. | 
                     
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          | Item No.: TSC | 
         
        
          
              
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                    | Schmidt-Cassegrain telescope | 
                   
                  
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