Honeywell Pentax 3 / 21 degree User manual

The Honeywell Pentax Three/Twenty-One  Ex-
posure Meter is new concept in exposure meters,
designed to give you complete control over every
exposure, from soft candlelight to dazzling sun.
No other meter gives you the extreme selectivity
of the 3" l2lo Meter. Because the light-sensitive
element covers an angle of only 3' (within a 21"
field of view), you read the light intensity of the
precise area you photograph-peripheral light
does not affect your reading.
  With the new 3" 121" Meter, you can take an
exact reading of an op-stage performer from your
seat in the orchestra or balcony. You can get
perfect exposures every time when your subject
is backlighted, or surrounded by highly reflective
sand or snow. And, for portrait work, the Three /
Twenty-One is unexcelled because you can take
your reading directly from the camera, regardless
of the camera-to-subject  distance. Gone are the
days when a meter had to be brandished under
your subject's nose!
  At close range, the new 3" l2l" Meter allows
you to measure the light reflected from several

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 different areas of your subject in order to deter-
 mine the exact effect you desire. This feature is
 especially valuable in color photography, where
 best results are normally achieved when the light-
 est area of your subject is no more than four times
 brighter than the darkest. With the Three /Twenty-
 One Meter, this four-to-one ratio can be checked
 upon with utmost accuracy.
   For distant shots with a long lens, your Three /
 Twenty-One Meter lets you zero in on the subject
 appearing in your camera's finder-dark or bright
 areas which will not appear in your picture cannot
 give you a false reading as often happens with
conventional unselective exposure meters. Only
the Honeywell 3" /2lo Meter gives you the ex-
posure control which results in one outstanding
picture after another!
   Using the 3" l2l" Meter is simplicity itself. You
simply view your subject through the viewing lens,
press the button for High or Low light intensity,
and take your reading. The meter contains an
optical system consisting of an objective lens, a
reflex viewing system, and a 1.5x eyepiece. The
objective lens has a special amber-colored coating
which properly corrects the color sensitivity of
the light-sensitive element, making the Three /
Twenty-One Meter highly accurate in critical color
photography. The viewing screen covers an in-
cluded angle of 21", and in the center of the screen
is a circle defining the 3" included angle in which
the meter's light-sensitive element functfons. (In
case you've been wondering where the meter gets
its name, there's the answer!)
  An EVS scale is located on the viewing screen.
Light intensity, expressed in terms of EVS num-
bers, is read directly from this scale. In bright

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                                                                                    ou=29,              mike butkus  DN:o=orphancameras,email=mike@butkus.org,cn=mike butkus,                                                                                c=US
                                                                           Date: 2019.07.07 13:27:55 -04'00'





light, the "High", or upper
portion of the scale is used,
while in dim light, the "Low"
portion is used, the selection
being made with the push but-
ton on top of the meter. The
push button has two posi-
tions; one for High-and one




                            for Low-scale read-  o                                ings. Begin by push-
                           ing the button only
                         half-way down. If
                                   light intensity  is low
                       and the needle does
                           not move enough to
give a workable reading, push the button all the
way down, and read the EVS number from the
scale marked "L".

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         The numbers on the EVS scale are
        exposure values for the 3"121" meter
         only and cannot be transposed directly
          to cameras with EVS or LVS svstems.





The meter's lens barrel contains two movable rings,
A and B. Ring A is marked with EVS numbers from
3 to 17 (1) and shutter speeds from Time to  I /4000
sec. (2), while Ring B contains f/stops from f/l  to
f 145 (3) and ASA film speed ratings from ASA 3 to
ASA 6400 (4). In operation, you simply line up the
ASA rating of your film with an index mark. Then
read the EVS number from the scale, line up the
number with its index mark, and choose a suitable
combination of shutter speeds and  f /stops which co-
incide on rings A and B. That's all there is to it-it's
fast, simple, and above all, highly accurate!
  The calibrations on the ASA number ring are as
follows: (Numbers in bold face are engraved on the
ring; the balance are indicated by markings)-
3, 4, 5,6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 64, 90, 100,
125, 760, 200, 250, 320, 400, 500, 640, 900,  I 000,  I 250,
1600, 2000, 2500, 3200, 4000, 5000, 6400.
  Your Three /Twenty-One Meter will operate for a
full year on two l.3v mercury batteries and one 22.5v
dry cell. The life of the batteries will vary, depending
upon frequency of use, but they should usually be
replaced after one year's use. The accompanying  il-
lustration shows proper battery positioning, and the
following are replacement batteries which may be used
in the meter:

I'


       l.3v illercury Battery                 22.5v Dry Battery
      Mallory RM-lR                     Bright Star l2P
      General RG-l                         Burgess Ul5
    RCA VS 143                 RCA VSO84
      Military BA-l312lU              Military B,A-261 lU
      Eveready E-l                       Eveready 412





      The 3"/21' Meter will retain its accuracy with an
       absolute minimum of attention. Should the needle ever
      not lie exactly on the zero mark when at rest, zeroing
         is easily accomplished by turning the adjusting screw
                         bodY.'     on top of the meter
         Built to precision stand4l$s by the same craftsmen
     who make Honeywell Pentil"tarneras and lenses, the
        3" /21" Meter is fully guaranteed against defective ma-
{'     terials or workmanship by'fuFi4neapolis-Honeywell.F   Ask you Honeywell dealer for a'.demonstration of
       this superb new exposure meter soon-once you try
          it, you'll realize that the 3" /21" Meter is one of the
     most valuable tools ever designed to make photog-
                 te wilh batteries and leather carrying case,
   bneywetl$79.50.
               Pr^fiA,P,Al^^fr   m                                 H83: 68