THE SHUTTER 



IS 



partments, one for each lens, and then my camera 

 was complete, with the exception of a shutter. 

 There are many stereoscopic shutters in the 

 market; none better than the Thornton-Pickard, 



Camera front, showing 

 position of single lenses, 

 mounted. 



The septum, or separator of brown 

 paper, for dividing camera into 

 two chambers. 



but as these are rather expensive, I made a rough 

 cardboard shutter which slid backwards and for- 

 wards in front of the lenses, and which acted 



Diagram of cardboard shutter, worked by pushing 

 backwards or forwards across the lenses. 



perfectly well for all purposes except instantaneous 

 photography. 



Later on, I found it necessary for my lenses to be 

 movable, in order that when photographing small 

 objects I could bring them nearer to one another. 

 It was not a difficult matter to mount each lens in 



