Kodak E-40 User Manual

TECHNICAL DATA

/ COLOR NEGATIVE FILM

KODAK ROYAL GOLD 25 Film

December 1996 • E-40

E-40

November 1996

DESCRIPTION

KODAK ROYAL GOLD 25 Film has the same technically
advanced characteristics as the film it replaces—KODAK
EKTAR 25 Film. Like all ROYAL GOLD Films, it is
designed and produced to meet the needs of knowledgeable
and discriminating photographers who want more from
photographs than general-purpose films can provide.
ROYAL GOLD 25 Film offers micro-fine grain, extremely
high sharpness, and the capability for an extremely high
degree of enlargement. The film is designed for exposure
with daylight or electronic flash.

Use ROYAL GOLD 25 Film in cameras that allow you to
set the film speed manually, or in cameras that will correctly
set the film speed automatically from the DX code on the
magazine. (Some automatic 35 mm cameras do not read the
DX code for ISO 25/15˚ film and will underexpose it.) This
film requires more precise exposure control than general­purpose films.

Other features include—

FEATURES

• Extremely high
sharpness

• Incorporates KODAK
T-GRAIN™ Emulsions

• Designed for
processing in KODAK
FLEXICOLOR
Chemicals for
Process C-41

• Built-in dye-masking
color couplers

• Enlargements of superb

• Micro-fine grain

• Can be processed with other

• Provides quality color

BENEFITS

clarity

ROYAL GOLD Films,
KODAK GOLD, EKTAR,
and EKTACOLOR Films,
KODAK Pro Films, and
KODAK VERICOLOR
and EKTAPRESS
Professional Films

reproduction without
supplementary masking

DARKROOM RECOMMENDATIONS

Do not use a safelight. Handle unprocessed film in total
darkness.

STORAGE AND HANDLING

Load and unload film in subdued light.

Store unexposed film at 70˚F (21˚C) or lower in the
original sealed package. Always store film (exposed or
unexposed) in a cool, dry place. Process film as soon as
possible after exposure.

Protect negatives from strong light, and store them in a
cool, dry place. For more information on storing negatives,
see KODAK Publication No. E-30, Storage and Care of

KODAK Photographic Materials—Before and After
Processing.

EXPOSURE

Film Speed

Use the speed numbers in the table below with cameras or
meters marked for ISO, ASA, or DIN speeds or exposure
indexes. Do not change the ISO-speed setting when metering
through a filter.

Light Source

Daylight or
Electronic Flash

Photolamp (3400 K) No. 80B 8/10˚
Tungsten (3200 K) No. 80A 6/9˚

* For best results without special printing.

KODAK WRATTEN

Gelatin Filter*

None 25/15˚

ISO Speed

©Eastman Kodak Company, 1996

Daylight

Use the exposures in the following table for average frontlit
subjects from 2 hours after sunrise to 2 hours before sunset.

Shutter

Lighting Conditions

Bright or Hazy Sun on
Light Sand or Snow

Bright or Hazy Sun (Distinct Shadows) 1/125
Weak, Hazy Sun (Soft Shadows) 1/125
Cloudy Bright (No Shadows) 1/60
Heavy Overcast or Open Shade† 1/60

* Usef/2.8 for backlit close-up subjects.
† Subject shaded from the sun but lighted by a large area of clear sky.

Speed

(second)

1/125

Lens

Opening

f

/8

f

/5.6*

f

/4

f

/4

f

/2.8

Electronic Flash

Use the guide number in the following table as a starting
point 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.

Unit Output

(BCPS)*

350
500 24/7

700 30/9
1000 35/11
1400 40/12
2000 50/15
2800 60/18
4000 70/21
5600 85/26
8000 100/30

* BCPS = beam candlepower seconds

Guide Number

For Distances in Feet/Metres

20/6

PROCESSING

Process KODAK ROYAL GOLD 25 Film in KODAK
FLEXICOLOR Chemicals for Process C-41. For more
information, see KODAK Publication No. Z-131, Using

KODAK FLEXICOLOR Chemicals.

IMAGE STRUCTURE

Sharpness: Extremely High
Degree of Enlargement: Extremely High
Print Grain Index: Less than 25

Print Grain Index

The Print Grain Index number refers to a method of defining
graininess in a print made with diffuse-printing illumination.
It replaces rms granularity and has a different scale which
cannot be compared to rms granularity.

• This method uses a uniform perceptual scale, with a
change of four units equaling a just noticeable difference
in graininess to 90 percent of observers..

• A Print Grain Index rating of 25 on the scale represents the
approximate visual threshold for graininess. A higher
number indicates an increase in the amount of graininess
observed.

• The standardized inspection (print-to-viewer) distance for
all print sizes is 14 inches, the typical viewing distance for
a 4 x 6-inch print.

• In practice, larger prints will likely be viewed from
distances greater than 14 inches, which reduces apparent
graininess.

• Print Grain Index numbers may not represent graininess
observed from more specular printing illuminants, such as
condenser enlargers.

The Print Grain Index number printed in this publication

applies to the following standards:

Negative size: 24 x 36 mm

(135 size)

Print size: 4 x 6 inches
Magnification: 4.4X

Adjustments for Long and Short Exposures

No filter correction or exposure compensation is required for
exposures from 1/10,000 second to 100 seconds. We do not
recommend exposures longer than 100 seconds.

2 KODAK ROYAL GOLD 25 Film • E-40