Kodak 500T Sensitometric Curves, MODULATION-TRANSFER Curves, Diffuse RMS Granularity Curves

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.

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.

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 special-effects work.

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

CAMERA STOPS

1000
RESPONSE (%)	100
	10
		1
		1		10	100		1000
				SPATIAL FREQUENCY (c/mm)
		3.0
		2.6
		2.2
							D
	DENSITY	1.8				.100	GRANULARITYSIGMA
		1.4				.030
		1.0				.010
		0.6				.004
		0.2				.002
		0.0				.001
		0.0	1.0	2.0	3.0	4.0
			RELATIVE LOG H (lux-seconds)
		4.0
		3.0
*
SENSITIVITYLOG		2.0
		1.0
		0.0

250 300 350 400 450 500 550 600 650 700 750

WAVELENGTH (nm)

*Sensitivity = reciprocal of exposure (erg/cm2 ) required

to produce specified density

RECIPROCITY

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 Color Compensating Filter CC 10R. In the 10- second range, increase exposure 1 stop and use a KODAK Color Compensating Filter CC 10R.

IDENTIFICATION

After processing, the Kodak internal product code symbol (EH), product code numbers 5218 (35 mm) or 7218 (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 500T Color Negative Film 5218 / 7218, 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 print- ers,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 Curve Key

Sensitivity of the yellow dye

forming layer

Sensitivity of the magenta dye

forming layer

Sensitivity of the cyan dye

forming layer

SPECTRAL DYE-DENSITY CURVES ➤

1.8

Spectral Dye Density Curve Key

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.

DIFFUSE SPECTRAL DENSITY

1.4										Midscale Neutral
										Cyan Dye
1.0										Magenta Dye
										Yellow Dye
0.6										Minimum Density
0.2
-2.0
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.