Traduction de Manuel M

(Photo-Revue 1899) The optical company Goerz has just created an instrument which can be used for the following uses:
Binocular of theater (magnification 2.5)
Binocular of country (magnification 3.5)

Camera allowing to make negatives, simple or stereoscopic, instantaneous or posed, with the format 4.5 x 5 centimeters.
The Photo-Stéréo-binocle has the form of an ordinary binocular of theater. The 2 tube of binocular are used at the same time as darkroom; they contain two rotating discs on which are located the eyepieces of the binocular and the photographic lenses. The lenses of binocular O are located in a hinged lid D, behind which are the chassis C or the grounded glasses M. The shutter is bent and opened by means of three pins: one cocks the shutter on the two side, the second cocks only on one side and let  the other tube free, and the third makes free the passage of the luminous rays in the two tubes for the optical observation.
The chassis are built in thin plates of laminated steel, numbered from 1 to 24 and contained in a case or a wallet in morocco.
For the photographic transaction, the rotating discs R are manipulated in order to put the lenses in place; one pushes the pin which uncovers the left lens, opposite which one puts the ground glass M, to make the focusing, unless one prefers automatically to adjust it for the various distances using graduated scale on the extension tube.
The focusing being made, one removes the ground glass, one set up one or two chassis, and one closes the lid] (pulled down in the figure). One cocks the shutter by means of that with the pins which corresponds to the kind of negative (simple or stereoscopic) that one wants to obtain.
One opens the chassis by getting out the handles B to which the valve rings K are adapted, to facilitate the handling; the exposure is done by pressure on the button C. When this button is unscrewed, one obtains the instantaneous and when it is screwed deeply, one can make some exposures with long time. One push back the handles B, pull down the lid D and removes the chassis while pressing on the hook E.
For the instantaneous exposures the speed of the shutter can be adjusted by the screw S located on the right-side of the caps; when the pin is completely unscrewed (i.e. when the button is entirely screwed towards the right) the exposure time is of 1/60 of second, when the pin is screwed deeply (i.e. when the button is entirely screwed towards the left) the exposure time is of 1/20 of second.  By locating the pin with the mark which it bears in its middle, one obtains the mean velocity of 1/40 of second.
To make the pose, one fixes the instrument on a foot/stalk] to immobilize the camera.

Price of the Photo-Stéréo-binocle , with two double lenses anastigmats Goerz, series III; a pocket containing 24 chassis 4.5 x 5 out of steel, and a leather case 375 francs.
Pocket for 24 additional chassis, 40 francs each
Additional metal chassis 0 fr 65
Plates 4.5 x 5, the dozen, 1fr. 30