Sociedad Ibero-Americana de la Historia de la Fotografia Museo Fotográfico y Archivo Historico "Adolfo Alexander"
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Welti I Dental Camera

The camera is on a stand which has the word GORET on the front as part of the casting. The shutter is cocked by depressing the vertical plunger on the right side of the camera (as you're looking toward the lens). There is a trigger under the camera which activates the shutter. You can see my thumb pressing it in the 2 photos which show the flash going off. The diaphragm is set by moving the thin rod which comes up at an angle from the front of the camera. The f/2.9 Meyer Optik Trioplan lens closes down to f/24. The focus is set by moving the body of the camera backwards, stretching the bellows, and inserting something into a slot. The original part is missing, so I made 3 short dowel lengths and inserted screws into their sides so I could insert and remove them easily. I determined the points of focus for these dowels by putting a plate of ground glass across the film plane with the back open. Color pictures taken with the camera at the three close-up distances were all sharp and contrasty. I did a short search for the photos but haven't found them yet. It takes standard 35mm film. There are 2 fixed mirrors on the front of the camera associated with the bulb of the flash unit. The bulb can be swiveled to adjust the aim of the flash. The flash is powered by a 120 volt AC unit. There is nothing which identifies the maker of the flash system. There is a depth of field chart on the back of the Welti which is for normal (non-dental) use. This suggests that the camera was modified by someone not associated with Welti. The name of the shutter is hidden behind the mirror mechanism. There is a PC cord attached, and it has flash synchronization. I would be happy to answer any questions you might have about this interesting piece. Let me know what you think.

   

 
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