Photomigraphic Cameras. 
EYEPIECE CAMERA WITH VIEWING ATTACHMENT. 
No. 3657. Eyepiece camera with observing tube, shutter and three single metal 
plateholders ... nes oe a a aa aa a teh bow RO 
No. 3658. Extra single metal plateholders _... ate =e es oe seach Ono 0 
This camera fits in the drawtube of the microscope and is so constructed that the object to be 
photographed is seen through the observing tube up to and during exposure. By means of the 
observing eyepiece the position of the object in the field and its correct focus are accurately set 
and the exposure then made by means of an antinous release fitted to the timed shutter. The plate 
carried by the camera is 34in. x 24in., and the size of the picture given is a circle of 2} in. 
diameter. 
The upper portion of the camera, i.e., the tapered box and shutter, can be removed from the 
lower part with its observing tube, and this lower portion forms a double demonstration eyepiece 
enabling two workers to observe simultaneously, one with the side eyepiece and one by means of 
the eyepie ce directly over the tube of the microscope. A pointer is fitted for indicating any special 
object 1 in the field. The eyepieces have separate focussing motions for bringing this pointer sharply 
in focus. For photography both eyepieces are pushed home i in the mountings and in this position 
they synchronise so that an object is in focus both in the observing eyepiece and on the plate of the 
camera. A ground glass screen is provided, so that this setting may be checked if it becomes 
necessary. 
The apparatus fits the standard size drawtube and has a clamp to ensure its rigidity. 
90 
