Kodak 7239 Exposure Table for Daylight, Reciprocity Characteristics, Processing, Identification

EXPOSURE TABLE FOR DAYLIGHT

At 24 frames per second (fps), 170˚ shutter opening:

Lens Aperture	f/1.4	f/2	f/2.8	f/4	f/5.6	f/8	f/11
Footcandles	16	32	63	125	250	500	1000
required

Use this table for average subjects that contain a combination of light, medium, and dark colors. When a subject includes only pastels, use at least 1¤2 stop less exposure; dark colors require 1¤2 stop more exposure.

Lighting Contrast

The recommended ratio of key-light-plus-fill-light to fill light is 2:1 or 3:1; you may use a 4:1 ratio if you want a special look.

RECIPROCITY CHARACTERISTICS

You do not need any filter or exposure adjustments for exposure times from 1 second to 1/10,000 second.

PROCESSING

This film may be processed in Process VNF-1, using either ferricyanide or persulfate bleach, and in Process RVNP. Force processing beyond 2 stops is not recommended.

EASTMAN EKTACHROME Film can be processed by the individual user, if desired. For information on procedures for machine processing the film, see KODAK Publication No. H-24, Manual for Processing EASTMAN Motion Picture Films.

IDENTIFICATION

The words “Eastman VND Safety Film” is latent-image printed along the edge of the film.

LABORATORY AIM DENSITY (LAD) CONTROL METHOD

To maintain optimum quality and consistency in the final prints, the laboratory must carefully control the color timing, printing, and duplicating procedures. To aid in color timing and curve placement, negative originals should be timed relative to the Laboratory Aim Density (LAD) Control Film supplied by Eastman Kodak Company. The LAD Control Film provides both objective sensitometric control and subjective verification of the duplicating procedures used by the laboratory.

In the LAD control method,* the electronic color analyzer used for color timing is set up with the LAD Control Film to produce a gray video display of the LAD patch, corresponding to 1.0 neutral density (gray) on the print. The negative printing original is then scene-to-scene timed. There are specific LAD values for each type of print or duplicating film that the original can be printed on. For print films, the LAD patch is printed to a neutral gray of 1.0 visual density. For duplicating films, the specified aims are at the center of the usable straight-line portion of the sensitometric curve of the film.

FILM TO VIDEO TRANSFER

When you transfer the film directly to video, you can set up the telecine with a negative Telecine Analysis Film (TAF) supplied by Eastman Kodak Company. The TAF consists of a neutral density scale and an eight-bar color test pattern with a LAD gray surround.

The TAF gray scale provides the telecine operator (colorist) with an effective way to adjust subcarrier balance and to center the telecine controls before timing and transferring a film. The TAF color bars provide the utility of electronic color bars, even though they do not precisely match the electronically generated color bars. Using the TAF will help obtain optimum quality and consistency in the film-to-video transfer.

For more information, see KODAK Publication

No. H-822,KODAK Telecine Analysis Film User’s Guide.

IMAGE STRUCTURE

The modulation-transfer curve, the diffuse rms granularity, and the resolving-power data were generated from samples of 7239 Film exposed to daylight and processed as recommended in Process VNF-1. For more information on image-structure characteristics, see KODAK Publication No. H-1, KODAK Motion Picture Film.

Diffuse RMS Granularity* 14

Resolving Power†	TOC 1.6:1	40 lines/mm
	TOC 1000:1	100 lines/mm

*Read at a net diffuse visual density of 1.0, using a 48-micrometer aperture.

†Determined according to a method similar to the one described in ISO 6328-1982, Photography—Photographic Materials— Determination of ISO Resolving Power.

*The LAD control method is described in the paper “A Simplified Motion-Picture Laboratory Control Method for Improved Color Duplication,” by John P. Pytlak and Alfred W. Fleischer in the October 1976 SMPTE Journal. Also refer to KODAK Publication No. H-61, LAD—Laboratory Aim Density.

2 EASTMAN EKTACHROME Film (Daylight) 7239™ · H-1-5239