User Manual

KODAK TRI-X Reversal Film 7266 • H-1-7266t 3
IMAGE STRUCTURE
The modulation-transfer curves and the diffuse
rms granularity were generated from samples of 7266 Film
exposed with tungsten light and processed in the
recommended reversal process at 24.4⋅C (76⋅F). For more
information on image-structure characteristics, see
KODAK Publication No. H-845, The Essential Reference
Guide for Filmmakers.
NOTICE: The sensitometric curves and data in this
publication represent product tested under the conditions
of exposure and processing specified. They are
representative of production coatings, and therefore do
not apply directly to a particular box or roll of photographic
material. They do not represent standards or specifications
that must be met by Eastman Kodak Company. The
company reserves the right to change and improve
product characteristics at any time.
Sensitometry
Sensitometric curves determine the change in density on
the film for a given change in log exposure.
Characteristic Curve
1.0
LOG EXPOSURE (lux-seconds)
4.0
0.0
2.0
DENSITY
1.0
2.0
3.0
1.0 0.0
Sensitometry:
Exposure:
Process:
60 Seconds at 76F (24C)
Daylight 1/50 sec
Diffuse visual
2.0
3.0
Modulation Transfer Function
The "perceived" sharpness of any film depends on various
components of the motion picture production system. The
camera and projector lenses and film printers, among other
factors, all play a role. But the specific sharpness of a film
can be measured and is charted in the Modulation Transfer
Function Curve.
Modulation Transfer Function Curve
This graph shows a measure of the visual sharpness of
this film. The x-axis, "Spatial Frequency," refers to the
number of sine waves per millimeter that can be resolved.
The y-axis, "Response," corresponds to film sharpness.
The longer and flatter the line, the more sine waves per
millimeter that can be resolved with a high degree of
sharpness—and, the sharper the film.
Note: These photographic modulation-transfer values
were determined by using a method similar to the one
described in ANSI Standard PH2.39-1977(R1990). The
film was exposed with the specified illuminant to spatially
varying sinusoidal test patterns having an aerial image
modulation of a nominal 60 percent at the image plane,
with processing as indicated. In most cases, the
photographic modulation-transfer values are influenced by
development-adjacency effects and are not equivalent to
the true optical modulation-transfer curve of the emulsion
layer in the particular photographic product.
Sensitometry:
Exposure:
Process:
60 Seconds at 68F (24C)
Tungsten
Diffuse visual
1001 2 3 4 5 1 0 20 50 200 600
SPATIAL FREQUENCY (cycles/mm)
RESPONSE (%)
10
1
2
5
3
7
30
20
100
70
50
200