ONTOFLEX Translate User manual

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ONTOFLEX

 FOR FILMS AND PLATES

NEW ITEM

 1935 SCALE MODEL


                           • The only reflex camera, using roll film or plates,
                                 that allows operation in both directions,
                                     vertically and horizontally, by means of a rotating
                                back. Its reduced size is almost that of a square-
                             format camera, yet it allows for the production of

                                     Digitally signed by Mike Butkus                             photographs in the practical 6 x 9 cm format.Mike Butkus DN:ou=Butkus.org,email=mike@butkus.org,cn=Mike Butkus, o, c=US
                                 Date: 2026.01.22 22:20:26 -05'00'
                           The ONTOFLEX is the device intended for the
                            hands of an "elite" who will certainly appreciate
                                            all the advantages achieved in the manufacture
                                 of a device of this kind. Thanks to its rational
                                 design, it is perfectly suited to taking
                             photographs of all kinds, including those
                              intended for photojournalism.
                           To this end, two different aiming methods have
                           been provided: the normal Reflex aiming method
                                 (see figure opposite) and the eye-level aiming
                            method, allowing operation in all situations.



 DESCRIPTION. - Metal body, covered in black leather, finely varnished and nickel-plated. The
 REFLEX's viewing chamber opens automatically and is equipped, at its upper part, with a
 magnifying lens allowing for precise focusing. It also includes an iconometric viewfinder for
 eye-level aiming.

The most striking feature of
this device is its reversible back, designed
for using roll film and which, in order
to allow shooting in both directions, is
reversible, that is to say, it rotates.

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The camera is fitted with a Compur
delayed-action shutter, providing speeds
from one second to 1/400th of a second,
and a two-stage exposure setting.

The synchronization of the focusing is
ensured by the fact that the two lenses are
mounted on a metal plate. The focusing
movement is achieved by a multi-threaded
helical ramp, driven by a precision gear
controlled by a knurled knob on which the
different focus settings are indicated, ranging
from 1 meter to infinity for a 90 mm focal
length lens, and from 1.5 meters to infinity
with 105 mm focal length lenses.


Film loading is as simple as in any other film camera. Tension and flatness are ensured by a
special film pressure plate. The back is equipped with a viewing window cover for use with
panchromatic film.

The camera comes with a neck strap and is equipped, on the back, with a depth-of-field scale
(for a 90 mm focal length). The film holder is removable and can be replaced, for the use of
photographic plates, with a special adapter.

"ONTOFLEX": & ACCESSORIES

Model A.
Allowing the use of film only.

With ORTHO-KYNOR Roussel 1:3.5 lens

90% focal length, Compur shutter with delayed action at 1/250 sec. . . . 995 fr

With fast Compur shutter with delayed action at 1/400 sec. andFLOR-BERTHIOT lens, 1:3.5,
90% focal length.                                    1,325 fr >>

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TESSAR-ZEISS Jena 1:3.5, 90% focal length. .                       1,525 fr >>

Model B.
With removable film back, allowing the adaptation of a plate back.         1f

Compur Rapid shutter with delayed action 1/400 sec.
FLOR-BERTHIOT lens 1:3.5, 90% focal length.                      1,400 >>

TESSAR-ZEISS Jena 1:3.5, 90% focal length.                        1,600 >>

- 1:3.8, 105 mm focal length.                                     1,700 >>

Leather case lined with velvet, for "Ontoflex".                        85

Orthochromatic screen "Ontoflex" (in leather case).                    50

Screen for Filmcolor.                                            75

Close-up lens (in leather case).                                     45

Adapter for single plate holder.                                    125

Single plate holder 6.5x9 white metal.                               14

Black metal plate.                                               6

Case for plate holder or adapter.                                   15

Dimensions of the ONTOFLEX:
Length: 16 cm. - Width: 8.5 cm. - Height: 11 cm. - Focal point 90 cm.
16 cm x 8.5 cm - 12.5 cm x 105 mm

Weight of the ONTOFLEX: approximately 1.250 g.