Kodak 5205, 7205 Sensitometric Curves, MODULATION-TRANSFER Curves, Diffuse RMS Granularity Curves

RECIPROCITY

SENSITOMETRIC CURVES ➤

"0" on the x-axis represents normal exposure of an 18-percent gray card in the red, green, and blue layers of this film. A white card is 2 1/3 stops higher than normal exposure, and there are at least 2 1/2 stops above that for capturing specular highlight detail.

A 3-percent black card is 2 2/3 stops below normal exposure. There are at least 2 1/2 stops of latitude below that for capturing shadow detail.

	LOG EXPOSURE (lux-seconds)
	-4	-3.2		-2		-1	-0.2
	3.0
DENSITY	2.0
	1.0
	0.0	-6	-4	-2	0	2	4	6
	-10 -8
			Camera Stops

No filter corrections or exposure adjustments for exposure times from 1/1000 of a second to 1/10 second. In the 1-second range, increase exposure 2/3 stop and use a KODAK WRATTEN Gelatin Filter CC10R. In the 10 second range, increase exposure 1 stop and use a KODAK WRATTEN Gelatin Filter CC10R.

IDENTIFICATION

MODULATION-TRANSFER CURVES ➤

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 millimetre that can be resolved. The y-axis, “Response,” corresponds to film sharpness. The longer and flatter the line, the more sine waves per millimetre that can be resolved with a high degree of sharpness—and the sharper the film.

DIFFUSE RMS GRANULARITY CURVES ➤

To find the rms granularity value for a given density, find the density on the left vertical scale and follow horizontally to the sensitometric curve and then go vertically (up or down) to the granularity curve. At that point, follow horizontally to the Granularity Sigma D scale on the right. Read the number and multiply by 1000 for the rms value.

1000

(%)	100
RESPONSE
	10

1

1 10 100 1000

SPATIAL FREQUENCY (cycles/mm)

	3.0
						D
DENSITY	2.0				.10	Granularity SIGMA
					.03
	1.0				.01
					.004
					.003
	0.0	1.0	2.0	3.0	.001
	0.0				4.0
		LOG EXPOSURE (lux-seconds)

After processing, the Kodak internal product code symbol (EQ), product code numbers 5205 (35 mm) or 7205 (16 mm), emulsion and roll number identification, and EASTMAN KEYKODE Numbers are visible along the length of the film.

GRAIN

The perception of graininess of any film depends on scene content, complexity, color, and density. In KODAK VISION2 250D Color Negative Film 5205 / 7205, the measured granularity is exceptionally low.

SHARPNESS

The perceived sharpness of any film depends on various components of the motion picture production system. Camera and projector lenses, film printers, and other factors play a role, but the specific sharpness of a film can be measured and charted in the Modulation Transfer Curve.

SPECTRAL-SENSITIVITY CURVES ➤

These curves depict the sensitivity of this film to the spectrum of light. They are useful for determining, modifying, and optimizing exposure for blue- and green-screen visual effects work.

SPECTRAL DYE-DENSITY CURVES ➤

These curves depict the spectral absorptions of the dyes formed when the film is processed.

They are useful for adjusting or optimizing any device that scans or prints the film.

NOTE: Cyan, Magenta, and Yellow Dye Curves are peak-normalized.

4.0

SENSITIVITY*	3.0										Sensitivity of the yellow dye
											Spectral Sensitivity Curve Key
	2.0
LOG	1.0										forming layer
											Sensitivity of the magenta dye
	0.0										forming layer
	250	300	350	400 450	500	550	600	650	700	750	Sensitivity of the cyan dye
				WAVELENGTH (nm)
											forming layer
	*Sensitivity = reciprocal of exposure (erg/cm 2) required
				to produce specified density

DENSITY	1.8
											Spectral Dye Density Curve Key
	1.4
SPECTRAL											Midscale Neutral
	1.0										Cyan Dye
	0.6										Magenta Dye
											Yellow Dye
DIFFUSE
	0.2										Minimum Density
	-0.2
	300	350	400	450	500	550	600	650	700	750	800
				WAVELENGTH (nm)

Note: Sensitometric and Diffuse RMS Granularity curves are produced on different equipment.

A slight variation in curve shape may be noticed.