2 KODAK PROFESSIONAL PORTRA 400 Film • E-4050
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.
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.
‡
Subject shaded from the sun but lighted by a large area of sky.
Adjustments for Long and Short Exposures
No filter correction or exposure compensation is required
for PORTRA 400 Film for exposures from 1⁄10,000 second
to 1 second. For critical applications with longer exposure
times, make tests under your conditions.
Light Source
KODAK
WRATTEN
Gelatin Filter
*
ISO Speed
Daylight or Electronic Flash None 400
Photolamp (3400 K) No. 80B 125
Tungsten (3200 K) No. 80A 100
Lighting Conditions
Shutter Speed (second)
and Lens Opening
Bright or Hazy Sun on Light Sand or
Snow
1/500
f/16
Bright or Hazy Sun (Distinct
Shadows)
1/500
f/11
*
Weak, Hazy Sun
(Soft Shadows)
1/500
f/8
Cloudy Bright
(No Shadows)
1/500
f/5.6
Heavy Overcast or Open Shade
‡
1/500
f/4
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
Fluorescent and High-Intensity Discharge Lamps
Use the color-compensating filters and exposure
adjustments in the tables below as starting points to
expose this film under fluorescent or high-intensity
discharge lamps. For critical applications, make a series of
test exposures under your actual conditions.
To avoid the brightness and color variations that occur
during a single alternating-current cycle, use exposure
times of 1⁄60 second or longer with fluorescent lamps;
with high-intensity discharge lamps, use exposure times of
1⁄125 second or longer.
Unit Output (BCPS)
*
Guide Number
Distances in Feet/Metres
350 85/26
500 100/30
700 120/36
1000 140/42
1400 170/50
2000 200/60
2800 240/70
4000 280/85
5600 340/100
8000 400/120
Ty p e o f F l u o re s c e n t L a m p
KODAK Color
Compensating
Filter(s)
Exposure
Adjustment
Daylight 20R + 5M +1 stop
White 40B + 5C +1 2/3 stop
Warm White 40B + 40C +2 stops
Warm White Deluxe 40B + 50C +2 stops
Cool White 30B +1 stop
Cool White Deluxe 40C + 10M +1 stop
High-Intensity Discharge
Lamp (CCT)
KODAK Color
Compensating
Filter(s)
Exposure
Adjustment
High-Pressure Sodium
Vapor
50B + 70C +2 2/3 stops
Metal Halide 5C + 10M +2/3 stop
Mercury Vapor with
Phosphor
30B + 5C +1 stop
Mercury Vapor without
Phosphor
80R +1 2/3 stop
