The Trokonet Cameras were manufactured by the Photo Materials Company (PMC) of Rochester New York from 1893 to 1895. The Photo Materials Company was incorporated in 1892 by Henry M. Reichenbach, Gustave D. Milburn, and S. Carl Passavant. Reichenbach and Passavant were chemists and Milburn was a camera maker, who invented the Trokonet Camera and served as the salesman.
The Trokonet cameras were intended for hand or tripod use and introduced in May or June of 1893. The camera magazine would accept up to either twelve glass plates or twenty-four cut films. The magazine was more of a cartridge, where it could be thrown away and replaced with a preloaded cartridge from the company or it could be reused and repacked by hand. The camera was made in two sizes and models were identified either by numbers or by letters. Each camera featured two finders, an instantaneous and time shutter with adjustable speed, rack and pinion focusing with a scale for focusing, an exposure counter, and two tripod sockets. The Camera were constructed of wood and covered in morocco leather.
No. 1 - The no. 1 camera was capable of making 3 1/2 inch sized exposures on cut films only. It featured a universal fixed focus lens, a time and instantaneous shutter operated with a single lever. Priced at $15.00 in the 1893 catalog.
No. 2 - The no. 2 camera was the same size as the No. 1 except that either twelve glass plate septum's or twenty-four cut film septum's could be used. Priced at $20.00.
No. 3 - The no. 3 camera was capable of making 4 x 5 inch sized exposures on either twelve glass plate septum's or twenty-four cut film septum's. With a single lens focusing attachment. Priced at $25.00 in the 1893 catalog.
No. 4 - The no. 4 camera was the same size as the No. 1, except it was fitted with a symmetrical lens, highest finish. Priced at $35.00 in the 1893 catalog.
Style C - Style C was capable of making 4 x 5 inch sized exposures on either twelve glass plate septum's or thirty cut film septum's. Fitted with a Gundlach double combination rectilinear Trokonet lens. Montgomery Ward reference price in 1895 was $31.50 in the 1893 catalog.
Style D - Style D was capable of making 4 x 5 inch sized exposures on either twelve glass plate septum's or twenty-five cut film septum's. Fitted with a single lens. Montgomery Ward reference price in 1895 was $18.75.
1974, THE ROCHESTER CAMERA AND LENS COMPANIES By R. Kingslake.
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