Instruction manual

3. BOTH DIALS CONTROL THE
CENTER DIAL TO CALCULATE
CORRECT EXPOSURE
When you MATCH these lines for
and SUBJECT, OS shown on page 20, you
move the Dials to ONE COMBINATION
of Shutter Speed and Lens Opening
gives CORRECT EXPOSURE.
SKY
that
4, MANY COMBINATIONS GIVE THE SAME EXPOSURE
Set these Dial Settings on your camera. Notice that both
give the same exposure -MATCH the same lines.
1/100
sec.
0 at f’4 q
gives a lot of light
for a short time.
1/25 sec. e at f/8 q
gives l/4 as much light
for 4 times
as long.
5. CHOOSE THE COMBINATION TO FIT YOUR PICTURE
After you hove correctly MATCHED Sky Brightness and
Subject Color with one combination of LENS OPENING and
SHUTTER SPEED, you will find many reasons for selecting
another LENS OPENING or SHUTTER SPEED.
6a.
HOW TO CHOOSE LENS OPENINGS
f/3.5 f/4
f/4*5
If it is Cloudy Dull, or Cloudy
on0
Bright, use one of these LENS
for POOR LlGHT OPENINGS instead of a
1
SHUTTER SPEED less than
1 /25
See Next Page
22