  | 
          Block 
            of solid aluminum that will become the camera block. Seen here at 
            the BU SIF after raw stock delivery, mounting holes bored and tapped, 
            and outer dimensions machined. | 
         
         
            | 
          Top 
            oblique view of camera block.  | 
         
         
            | 
          Camera 
            block mounted on Okuma milling center. Note bore holes labelled "B", 
            "H", "F", and "I". The lower row will 
            hold the lenses and mirrors making up the F/5, F/17, and Pupil Viewer 
            Cameras. The top bore hole is a pass hole that is part of the F/17 
            "dog-leg".  | 
         
         
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          End 
            view of camera block on Okuma milling center. The block is some 12 
            inches high, 6 inches deep, and 8 inches wide. | 
         
       
       |