Sekonic L-398M Instructions d'exploitation

SEKONICSTUDIO DELUXE II L-398MOperating Instructions

needle deflects according to brightness. When the stopper button is released, the meter needle becomes fixed at the deflected position. If th

1 c'. g. At this time, the shutter speed scale and aperture scale combination becomes the correct exposure. Example: With High slide inserted,

2. Lumidisc. Employ for illumination contrast Adjustment and luminance measurement. • Contrast measurement a. Mount Lumidisc sensor Install in

• Luminance (Lux) measurement a. Mount Lumidisc Lumisphere. to light sensor in the same manner as b. Place Lumidisc parallel with the measured

13 Reading this exposure value to perform setting becomes convenient for cameras which employ a light value system shutter and aperture comb

Note: Standard theatrical cine film speed is 24 fps at 1/50 sec. This position is indicated by a red line on the scale. 14 Note

3. Using Exposure Multipliers (-2, -1, +1, +2) Exposure multiplier indications are provided at both sides of the marks of the dial scale. Use the -1

Note: One set of slides consists of slide numbers 1 - 11 in a case. The High slide can also be used as a direct reading slide. 2. Direct Reading S

MEASUREMENT EXAMPLES WITH VARIOUS SUBJECTS 1. Portrait Photography There are various kinds of human subject photography. In a case, for example, of

2. Typical Scenery In the case of scenery, measure by using the Lumisphere at the camera position (refer to section on Incident Light Measurement). A

Features...2 Specifications...

Distant scenes are subject to haze due to atmospheric effects on light and can be easily overexposed. For this reason, first use the Lumisphere and m

4. Snow Scenes a. Many cases of problems occur with reflected light measuring methods due to snow surface glare. Using incident light measurement

0Note 3: In situations with direct or top lighting (sun near zenith), the Lumisphere will detect reflected light from the snow surface. Some means

In typical cases of back and side lighting, although the surface of a 3-dimensional subject facing the camera becomes dark, a portion is usually str

APPLICATIONS SUMMARY 1. Special Features of the Studio Deluxe 11 As the Studio Deluxe ll is a high precision measuring instrument, by fully utilizing

2. Illumination Contrast Light balance measurements are the most important application of the Lumidisc. This consists of measuring the ratio of main l

Main light measurement Fill in light measurement Use white or silver reflector to brighten shadow portions of subject. Exposure measurement 25

Illumination ratio can be varied by keeping the main light fixed and varying the fill in light. Reflected Light Measurement Reflected light measureme

Shown here is an example of using Lumisphere and by normal measuring method without slide, meter needle indicates 640 footcandles. With film sensit

b. Hold meter about 15cm from the subject, point Lumigrid to each surface of the subject and read the footcandle scale value. c. To determine the l

Nearly all photographic subjects combine complex variations of strongly reflecting surfaces (high reflectivity) and weakly reflecting surfaces (low r

The Studio Deluxe indicates normal color photograph luminance range limits corresponding to 2 f stops left and right of the luminance range center p

examples to provide full control over movie scenes. It would not be erroneous to also apply these to still photos. Stage 1 Determine overall lighti

Adjust luminance range a. Install Lumisphere. b. Hold meter at subject position, point Lumisphere toward camera and read needle indication. With a

As can be noted from the above formula, if the subject luminance is fixed and the magnification changes, the film plane brightness (illumination) var

Compensation factor = (M + 1)2 Compression Enlargement . Subject to Compensation Subject to Compensation image ratio factor image ratio Factor 2

HANDLING CAUTIONS Since the Studio Deluxe ll is a high precision instrument, use ample care in regard to the following points. Avoid dropping or subje

SEKONIC CORPORATION 7-24-14, OIZUMI-GAKUEN-CHO, NERIMA-KU, TOKYO 178-8686, JAPAN TEL: (03) 3978-2335 FAX: (03) 3978-5229 T156270B-A

7. After combining film sensitivity and shutter speed, direct reading slides (optional) can be used for directly determining the aperture value. 8.

Measuring System Incident light (reflected light system also capable) Measuring Range At ISO 100, EV 4-1 7 Measuring Accuracy Within ± 0.3 EV (

PART DESIGNATIONS Fror’ pointer xopper button mat Lumlsphera Light sensorm 1 Footcandle scale ,;nrirlan+ linb.+\ P \ Aperture value -1 (for d

Lumisphere Lumidisc Lumigrid Total of 11 direct reading slides (set of 11 slides in case). e; Optional Accessories (sold separately). Direct

1. Stopper Button Operation If the stopper button is press- ed when the stopper button mark is set to the meter needle deflects according to br

Incident Light Measurement 8 1. Lumisphere a. Mount Lumisphere sensor To white dots of Lumisphere frame and light sensor, then turn Lumispher