DW-68 User manual

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 Outdoor Scenes                           Incident Light
   The meter is read when pointed toward the subjeet                  Measuring the light that actually falls on a subject
  lrom the camera position, in the same manner as you                    is especially valuable for determining the exposure
  point your camera. This technique is satisfactory for                 under dim-light conditions. To do this, the hood  is
  practically  all outdoor scenes. The main exceptiln is                rnapped off, and the meter is held near the subject
  where the brightness in the background, as viewed by                   with the cell pointed toward the camera. The exposure
  the meter, is widely difrerent from that of the principal                      is then dialed, using the HOOD OFF &rrow on the
  rubject. Examples of such scenes are back-lighted sub-                     calculator. The meter then gives the best average
  jects and dark subjects against light backgrounds. For                  exposure for the measured illumination.
  these scenes, the exposure should be measured by tak-                              If, outdoors, the meter cannot conveniently be held
  ing a close-up reading on the actual subject or a similar                 near the subject, the incident light can be measured
  substitute  subject.                                              from any position where the illumination is the same.
    fn making a close-up reading, the meter is actually                 For example, at dusk when the light may be dim but
  held as near to the subject as convenient. (Be careful                   uniform, the incident light can be measured from the
  not to measure the shadow cast by the meter.) Although                 camera position.
  the brightness of a subject is independent  of distance,                   This method (incidentJight method) of measuring
  the meter can indicate that brightness so long as it sees                    exposure  is highly dependable.It gives correct exposure
 only the particular subject; hence, it is held close to                   for the middle tones in a picture regardless of the
  cmall subjects, but may be held proportionately farther                    brightness of the scene or the prcdominant brightnesc
 from larger surfaces.                                                     of unimportant  parts of the subject. If the important
   As a substitute of corresponding reflectance, the palm                   parts of the subject should be unusually dark, the ex-
  of the hand is often convenient. A close-up reading, with                  posure can be increased 14 !-stop;  if unusually light,
 the meter held about four inches from the hand, will                  the exposure c&n be deereased % /-stop.
 give dependable exposure for average scenes. If  the               The Type DW-68 meter ean be used to measure
  subject is in a shadow, the hand is held in the shadow                    incident light, under all light conditions, by extending
  of the body.                                                                       its range with multiplying masks. A set of four such
   Sometimes  it is necessary to determine exposure on               masks is available with multipliers of 10, 40, 100,
 the basis of reading from the camera posibion. The ex-                and 400. The masks may be obtained at photographic
 posure is then simply doubled for sideJighted subjects                       dealers.
 and redoubled for backJighted subjects.                                      After the illumination has been rneasured, the value
                                                                                      of the light reading is set opposite the proper arrow
 Indoor Scenes                                              on the ealculator.MASK          ARROW
   With daylight illumination, use daylight exposure                       None              Hood Ofr                                                                  r0x                Spade
                                                                                               Cover Open index; with photoflood illumination, use tungsten ex-                      40x
 posure index. A close-up reading of the most important                        r00x               Diamond
 part of the subject will give dependable exposure.                           400x                Cover (llosed

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