Inperial View-Finder CdS User manual

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Uiew-Finder CdS model
  Erpoeure Meter





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INSTRUCTIONS www.butkus.usFOR USE.
                   Inserting and Testing the Batterv.                    ,
             L  Remove the battery compartment cover (27) and insert the mercury battery (1.3 volt Mallory R. M. -625) into the compart-
                     ment. Replace the cover (27) lirmly. The cover can be screwed out and in with a coin.
                  2.  fVhen the meter is not in regular use it is advisable to remove the battery as this prevents accidental switching on of  the
                        meter. However, the battery should not need replacement for at least one year'
                  3. To check the battery, covcr the C. D. S. cell window  (l) completely, then press the On-Off switch (25) and if the needle
                            (6) moves to the Zero scale (4) the battery is alright
                  4. When the On-Off switch (25) is off, the needle must stay on the Zero Scale (5) if not adiust the needlet position by use
                     of the Zero adiusting screw (26).
                 Setting the Film Speed (Sensitivity).
                     Set the ASA or DIN speed of the film at the ASA speed indicator (12) or the DIN speed indicator (14) by rotating tfie
                        F-Stop Dial (15) using the F-Stop dial knob (21). Wnen doing this make sure that the Hightow Lever does not move and is
                          firmly in the High or Low position.
                UsinE the Meter.
                              l.  Take the Exposure Meter and set the High-Low Lever (13) at the High Mark (11) if the subiect is in subdued light or  if
                        the subiect is ln bright light set the lever at the low mark (16).. The High mark sets the meter at a high sensitivity  sett-
                            ing and the low mark at a nbrmal sensitivity setting.
                  2.  Press the On-Off svritch (25), the needle (6) will then move, rotate the shutter dial (7) so the indicator (24) covers the
                        needle and the needle is between the prongs of the indicator.
                  3.   lf the High-Low switch lever (13) is set at the High mark (ll) and the needle comes over the full scale (23) switch the
                          lever to the low mark (16).
                  4. The accurate combination of shutter speeds and aperfure settings (f-Stops) can bo obtained on Shutter Speed scale (22) and
                        the F-Stop scale (20).
                  5.  Exposure Value Numbers (E.V.) are shom in the E.V. window (18), lf the camera in use has an E.V. scale these numbers
                       are then directly transferred on to the camera's shutter settings.
F                6.  When(9) andusingthe thecinemeterF-Stopwithscalea cine(8). Camera the correct combination of (F-Stops) can be obtained on Cine Frame speed scale
                  7. When measuring the exposure of the subiect look at the subiect through the Reflex View Finder (3) you can then tell r*rether
                         the subiect comes within the C. D. S. cell's field of view.

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The 'lmperial" Cadmium Sulphide  Viewf inder Exposure Meter is a precision instrument with an extremely high sensitivity and repuircs
 careful handling despite the fact that it has a iewelled movement and that shock resistancb has been increased by careful asse-
 mbly of the movin! parts. Falls and knocks should at all times be avoided. The leather case helps to protecf the. meter and
 use of the neckstrap helps to prevent accidental dropping of the meter.


Colour Photography
Carefully follow the instruction which comc with every colour film. LiSht and dark colorrs and the various shades of daylight arc
a large factor in determining the exposure speed in colour photography more so than in black and white. When using a new t),pe
of colour film make test exposures so that you know the latitude and,colour bias of the film.


Landscape Photography
When a large area is to be covered in the photograph it is better to take two readings of the area to be covered since the acce-
ptance angle of this meter is much narrower than normal. The correct exposure is taken as the average between the two.