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©Eastman Kodak Company, 2005
AS-2569
KODAK AEROCHROME III MS Film 2427
KODAK AEROCHROME III MS Film 2427 is a very
fine-grain, medium-speed color-reversal 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 AEROCHROME 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.
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 humidity, 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.
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.
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.
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.
*
Granularity values read at a net green diffuse density of 1.0 with a
48-micrometre aperture.
Nominal speed, daylight (no filter): EAFS or ISO A 32
(based on development in KODAK EA-5 Chemicals)
Resolving Power (line pairs/mm)
rms Granularity
*
TOC 1.6:1 TOC 1000:1
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