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4 KODAK PROFESSIONAL PORTRA 160NC, 160VC, 400NC, 400VC, 400UC, and 800 Films • E-190
EXPOSURE
Film Speed
Use the speed numbers in the tables below with cameras or
meters marked for ISO, ASA, or DIN speeds or exposure
indexes (EIs). Do not change the film-speed setting when
metering through a filter. Metering through filters may affect
light meter accuracy; see your meter or camera manual for
specific information. For critical work, make a series of test
exposures.
*
For best results without special printing.
Note: The latitude of PORTRA 160NC and 160VC Films
allows you to use 100-speed proofing products for test
exposures.
Daylight
Use the exposures in the table below for average frontlit
subjects from 2 hours after sunrise to 2 hours before sunset.
*
Use f/5.6 for backlit close-up subjects.
†
Use f/8 for backlit close-up subjects.
‡
Subject shaded from the sun but lighted by a large area of sky.
Light
Source
KODAK
WRATTEN
Gelatin
Filter
*
ISO Speed
160NC and
160VC
Films
400NC,
400VC,
and
400UC
Films
800 Film
Daylight or
Electronic
Flash
None 160 400 800
Photolamp
(3400 K)
No. 80B 50 125 250
Tungsten
(3200 K)
No. 80A 40 100 200
Lighting
Conditions
Shutter Speed (second)
and Lens Opening
160NC and
160VC
Films
400NC,
400VC, and
400UC Films
800 Film
Bright or Hazy Sun
on Light Sand or
Snow
1/125
f/16
1/500
f/16
1/1000
f/16
Bright or Hazy Sun
(Distinct Shadows)
1/125
f/11
*
1/500
f/11
*
1/500
f/16
†
Weak, Hazy Sun
(Soft Shadows)
1/125
f/8
1/500
f/8
1/500
f/11
Cloudy Bright
(No Shadows)
1/125
f/5.6
1/500
f/5.6
1/250
f/11
Heavy Overcast or
Open Shade
‡
1/125
f/4
1/500
f/4
1/125
f/11
Electronic Flash
Use the appropriate guide number in the table below as
starting-point recommendations for your equipment. Select
the unit output closest to the number given by your flash
manufacturer. Then find the guide number for feet or metres.
To determine the lens opening, divide the guide number by
the flash-to-subject distance. If negatives are consistently too
dense (overexposed), use a higher guide number; if they are
too thin (underexposed), use a lower number.
*
BCPS = beam candlepower seconds
Unit
Output
(BCPS)
*
Guide Number
Distances in Feet/Metres
160NC and
160VC Films
400NC, 400VC,
and 400UC
Films
800 Film
350 55/17 85/26 120/36
500 65/20 100/30 140/42
700 75/22 120/36 170/50
1000 90/27 140/42 200/60
1400 110/33 170/50 240/70
2000 130/40 200/60 280/85
2800 150/46 240/70 340/100
4000 180/55 280/85 400/120
5600 210/65 340/100 470/140
8000 250/75 400/120 560/170