Bronica ETRS Film Back ETRS 135 User manual

The Film Back ETRS 135 has been developed as an
integral accessory for the Zenza Bronica ETRS single
lens reflex system.
Because it  is possible to interchange film backs, the
accessory makes it possible to increase the scope of
photography with the ETRS to cover the 35mm format,
too, whereas medium format cameras were generally
limited to the 120 and 22O roll  f ilms previously.
The accessory is available in two frame sizes, or the
ETRS 135-N (normal) with a standard frame size of
24 x 36mm and the ETRS 135-W (wide) with a wider
frame measuring 24 x 54mm. Both types are used in
the same manner but must be used with their exclusive
film holders, which are not interchangeable.
The optional Focusing Screen E-135 is also recommended,
in place of the standard focusing screen, since there are
frame area indications for both frame sizes, in this case.         {
Please read the instructions through completely before                         4'i
you use the accessory, as you will then be able to use the
                                                                                                                                                                                                                                                                                                                             Iaccessory with greater ease and more satisfaction.                                                                               l

                                                                                                                                                                                                                                                                                I

                                                                                                                                                                                                                        l

pecifications of the Film Back ETRS 135
    Type                    : Interchangeable type film back for 35mm
                           film use.
     Models                 : Film Back ETRS 135-N (normal) for
                         standard frame size and Film Back ETRS
                   135-W (wide) for wide frame size pho-
                          tography.
    Cameras                : For use with Zenza Bronica ETR and ETRS
                         models.
     Film                       : Cartridge-loaded J135 film.
    No. of Frames         : 36Ex.l24Ex.l2OEx.l 12Ex.
                                : 36Ex.l24Ex.l2OEx.l12Ex.  (ETRS 1 35-N)
                                    : 23Ex.l15Ex./12Ex.l 7Ex. (ETRS 135-W)
     Negative Size          : 24 x 36mm (ETRS 135-N)
                                  : 24 x 54mm (ETRS 135-W)
    Winding Action        : One full forward revolution of the film
                      winding crank on the main camera body
                            (irrespective of frame size). Ratcheted
                       winding also possible. Manual film winder
                             available on film back.
                                                                         1

                                                                                $l@

www.butkus.us

Rewinding Action  : Manual rewinding with rewinding crank on
                        film back.
Exposure Counter : Automatic re€etting additive type.
Dimensions       : 91mm wide x 46mm long x 74mm high
Weight                 : 430 grams
* Focusing Screen E-135 (Optionall
Exclusive focusing screen with standard (N) and wide {w} frame
areas indicated (arailable in microprism/split-image type or matte
type); shows 95.8o/" of the actual frame area; eichangeable with
standard focusing screen.
* Film Back ETRS 135-N and Film Back ETRS  i 3S-W must be
used with their exclusive  f ilm holders only.


                                o

Venmo @mike-butkus-camera  Ph. 2083
PayPal Name  Lynn@butkus.org      www.PayPal.me/lynnbutkus

www.butkus.us





                         Frlm transporl
       Film cartridge      sprockel
        cnamber
Film                           take-up spool
transport  rollel

              o

Back Construction  1      | Film





        www.butkus.us
                                              pressure plate  frame mask
  A. The Film Back ETRS 135       B. The film  holder is  the
  consists of a film back and        insert for loading film in the
  film holder insert. The film        film back and has film cartridge
  back has the film winding and     chamber,  film    transport
  rewinding mechanisms, a dark       sprocket, take-up spool, frame
  slide slit and the coupling        mask, pressure plate, etc.
  mechanism to the main camera
  body.
6l

B. Pull the rewinding crank,      C. Insert the film  cartridge
 on the base of the film back,        into the film cartridge chamber, down. Then, pull out the film     as indicated (with the film
  holder from the film back,        feed opening located deep inside
     f rom the side with the  f ilm       the guide). Pull the film leader  cartridge chamber.                out slightly, wrap it  around
                                the outside of the roller and
                                           insert it into the slit made by
                                 the frame mask and the Pres-
                                      sure plate on the front side.@

www.butkus.us





D. Pull the film out from       E. Next, rotate the manual
the slit between the   f rame       film winder one-half turn, in
mask and pressure plate and      the arrow-indicated direction,
insert it into the take-up spool      which will reverse the rewind
slit, with perforations engaging      button. The rewind buttonthe film  transport sprocket        will automatically move down,
teeth, as illustrated. Rotate       with an audible click. About
the take-up spool about one-    2mm of the rewind button top
half turn, in the arrow-indicated         will still be seen, inside the  f ilm
direction, and engage the  f ilm,          back, when it is fully reversed. @

.::r'.it.:t.





                                               www.butkus.us
  F. Insert the loaded film holder      G. Push the rewinding crank
   into the film back. (The rewind-     back in, which will fix  the
  ing crank should, of course,               f ilm cartridge. Then, while
    still be pulled out, at this time.)       holding the  f ilm holder, rotate
 The film holder should be     the rewinding crank in  the
  inserted diagonally, with the      rewinding direction (as indi-
  sprocket teeth side going in       cated by the arrow) or turn the
   first, after which the cartridge      manual  f ilm winder in  the
  chamber side should be pushed      winding direction (as arrow-
@in fully.                             indicated) and take up any
                                           slack in the  f ilm.

www.butkus.us





H. Close the back cover, by           l. Attach the film back to the
pressing it firmly against the     main camera body.   Then,
base of the film back, as illus-       rotate the film winding crank
trated. The back cover will     and take blank shots until
automatically lock and close,       the first dot(o) appears in the
with the safety lock also locking      exposure counter. The film
the back cover release button.          is advancing properly  if  the
                                     rewinding crank rotates in the
                                        clockwise direction (as indicated
                                 by the red arrow), at this time. O

4l  Ell*JYP" lrdicator       5





  Upon loading the film, tear off       Rotating the film winding crank
  the end flap from the film       once, in the forward direction,
  package and insert it into the       until  it  stops, will advance
  film type indicator frame. This       film and cock shutter, at the
  will help you keep track of the      same time.  Or, short, rapid
  film loaded in the film back,        strokes will also do the same
  even when two or more film         iob.
  backs are used with different
  films.
@

6l Exposure Counter            www.butkus.us





The exposure counter is additive
and shows the number of frames
exposed. Starting from "S",
even numbers are shown as
actual numbers and  odd
numbers as dots. "5", 12,24,
24 and 36, as well as dots for
7, 15 and 23, are in orange
but the rest are whitecolored.
                                                                                                                                                                          fl?\v

7l film Rewinding
                                            " Use the multiple exposure
                                              lever on the main body for tak-
                                ing multiple€xposed  pictures.
                                         Multiple exposures are not pos-
                                      sible by pressing the rewind
                                   button on the film back, since
                                  the film will be advanced, in
                                                this case.



  Upon exposing all frames, push       manual film winder of film back
  the rewind button in and rotate        slightly to forward direction
  the rewinding crank in  the       while pressing the rewind but-
  direction of the arrow-indica-       ton in for a short time.
  tion, until tension decreases and      And, conf irm the rewind button
  the  f ilm is rewound.                    being pressed in.
  Should the rewind button pop
  up again, when pressed, turn the
  winding crank of main body or
@

www.butkus.us
     al Film Unloading

                                          Warning
                              Commercial  photof inishing
                                          machines will automatically cut
I                           35mm film in strips, thereby
                                        destroying several  f rames of
I                                    your wide format (24x54rnm)
                                        pictures.  lt  is important to
                                              advise your photofinisher NOT
                                      to cut your negatives if they
                                    were produced with wide size
                                     (24x54mm) 35mm film back.

      Upon rewinding the film, open
      the back cover and unload the
                 f ilm in the reverse order of
       the loading operation.




                                       @

9f Focusing Screen

                                                 6-\\9


                 screen E- 1 35                Focusing screen E-135
                                                        (Matte)
 The focusing screen of  the     When using   f inders with a
  main camera body does not        built-in exposure meter, proper
  show the  f ields of view of       exposure will not be possible
  the Film Back ETRS 135 and     when extreme high-lights or
  should be exchanged for an      shadow areas are found outside
   exclusive Focusing Screen E-1 35      the normal (N) or wide (W)
  (microprism/split-image  or       frame areas. Therefore, do not
  matte type) which shows 95.8%      cover the area outside the
   of the actual frame.                frames with a black mask,
  See instructions for the main     as  it  should be possible to
  body on exchanging the focus-       check the outside area, too.
@ing screens.