Kodak AS-2569 User Manual

AS-2569

KODAK AEROCHROME III MS Film 2427

KODAK AEROCHROME III MS Film 2427 is a very
fine-grain, mediu m-speed color - re vers al aerial camera film.
This film has excellent color rendition and good image
quality.

It has an ESTAR Base with a clear gel backing. The
ESTAR Base has good optical qualities and provides
flexibility, moisture resistance, high tear resistance, and
excellent dimensional stability.

This film can be processed in Process AR-5 using
KODAK EA-5 Chemicals in modern, continuous-processing
machines such as the KODAK Aerial Color Processor,
Model 1611 or the KODAK EKTACHROME RT Processor,
Model 1811. It can also be processed in rewind equipment
such as the Gordon/Morse rewind equipment.

APPLICATIONS

KODAK AEROCHR OME III MS Film 2427 is intended for
low- to medium-altitude mapping and reconnaissance
applications. It provides positive color transparencies
suitable for projection, direct viewing, or making color
prints.

BASE

3.9-mil (0.10 mm) ESTAR Base with a clear gel backing.

EXPOSURE

Aerial Film Speeds (EAFS or ISO A equivalent) should not
be confused with conventional film speeds, which are
designed for roll and sheet films used in pictorial
photography. The characteristics of aerial scenes differ
markedly from those of ordinary pictorial or ground scenes
because of the smaller range in subject luminance,
atmospheric haze conditions, and other factors. Therefore,
different film-speed characteristics are used to relate
aerial-scene characteristics to practical exposure
recommendations.

The KODAK Aerial Exposure Computer, KODAK
Publication AS-10, has been published based on the aerial
film speed criterion.

Nominal speed, daylight (no filter): EAFS or ISO A 32
(based on development in KODAK EA-5 Chemicals)

Note: The Aerial Film Speed given in this publication is
rounded to the nearest cube root of 2 step (equivalent to 1⁄3
stop).

Filters

No color-correction filters are used with this film, although a
haze filter, such as a KODAK WRATTEN Filter HF-3 or
No. 2B may be necessary for reducing the effects of
atmospheric haze.

TOTAL FILM THICKNESS

The nominal total thickness (unprocessed) of this film is

5.44 mils (0.14 mm). This includes emulsion—1.04 mil
(0.03 mm), base—3.9 mils (0.10 mm), and backing—

0.50 mil (0.013 mm).

WEIGHT

The weight of AEROCHROME III MS Film 2427
(unprocessed), conditioned in equilibrium with 50 percent
relative hu midity, is 0.038 lbs/sq ft (0.0172 kg/sq ft).

SPECTRAL SENSITIVITY

This multilayer, color-reversal film is balanced for daylight
exposure.

SAFELIGHT

Total darkness is required.

©Eastman Kodak Company, 2005

Typical Camera Exposure

A typical exposure for this film is approximately 1⁄500
second at f⁄4.7. This exposure is based on a solar altitude of
40 degrees, a clear day, and an aircraft altitude of 5000 feet.

When using an aerial camera equipped with an
antivignetting filter, or other filter, it is important to increase
this typical exposure by the filter factor of the filter used.

IMAGE STRUCTURE

The following data are based on processing in KODAK EA-5
Chemicals, Process AR-5.

Resolving Power (line pairs/mm)

TOC 1.6:1 TOC 1000:1

80 100 13

*

Granularity values read at a net green diffuse density of 1.0 with a

48-micrometre aperture.

rms Granularity

*

STORAGE

For consistent results, all aerial films should be stored under
fairly constant conditions. Kodak aerial films are “usually”
packaged in equilibrium with 40 to 50 percent relative
humidity. High temperatures or high humidity may produce
undesirable changes in the film.

Unexposed Film

Store unexposed film in a refrigerator at 55°F (13°C) or
lower, or freezer at 0 to -10°F (-18to-23°C), in the original
sealed container. If the film is stored in a refrigerator,
remove it about 2 hours before opening; if stored in a freezer ,
remove it about 8 hours before opening. A sufficient
warm-up time is necessary to prevent moisture condensation
on cold film– otherwise, moisture spotting, ferrotyping, or
sticking may occur.

Exposed Film

Keep exposed film cool and dry. Process the f ilm as soon as
possible after exposure to avoid undesirable changes in the
latent image. If it is necessary to hold exposed but
unprocessed film for sev eral days (s uch as o v er a weekend),
it should be resealed and refrigerated at 40°F (4°C) or lower .
Before unsealing and processing exposed film that has been
held in cold storage, follow the warm-up procedures
described for unexposed film described above.

Processed Film

For best keeping, store processed film in a dark, dust -free
area at 50 to 70°F (10 to 21°C) and 30 to 50 percent relative
humidity. Preferably, store negatives on the spool or in
individual KODAK Sleeves. High relative humidity
promotes the growth of mold and causes ferrotyping. Very
low relative humidity causes excessive curl and brittleness.
Avoid storage temperatures over 80°F(27°C).

PROCESSING

The primary recommendation for processing 2427 Film is in
Process AR-5 using mechanized processors. Mechanized
processing in roller-transport processors offers the
advantages of uniform treatment of all portions of the roll,
freedom from banding, and absence of significant density
variations from ends of the roll to the center.

Process AR-5 Cycle Times

Processor Transport

KODAK Aerial Color
Processor, Model 1611

KODAK EKTACHROME
RT Processor , Model 1811
(with Quick-Change)

KODAK EKTACHROME
RT Processor , Model 1811
(Standard Configuration)

Speed (feet
per minute)

3.5 17.4 min

3.5 17.2 min

5.3 13.6 min

In each case, the film is fed emulsion side down into the

processor.

This publication provides general information regarding
the KODAK Aerial Color Processor, Mode 1611, and the
KODAK EKTACHROME RT Processor, Model 1811.
Refer to the operating manuals for additional set-up
information.

Note: For a list of firms equipped to offer machine
processing of 2427 Film, write to Eastman Kodak Company,
Aerial Imaging, Rochester, New York 14653-7128.

Chemicals

Process AR-5 uses the following KODAK EA-5 Chemicals:

KODAK EA-5 First Developer *
KODAK EA-5 First Developer Replenisher
KODAK EA-5 First and Second Stop Bath and

Replenisher
KODAK EA-5 Color Developer
KODAK EA-5 Color Developer Replenisher
KODAK EA-5 Bleach and Replenisher
KODAK Aerial Color Fixer and Replenisher
KODAK EA-5 Stabilizer and Replenisher
The first developer working solution is prepared by

combining one part first developer with two parts first
developer replenisher.

Dry-to-Dry

Processing

Time

Notice: Observe precautionary information on product labels and on

the Material Safety Data Sheets.

2 KODAK AEROCHROME III MS Film 2427 • AS-2569