ملخص المحتوى في الصفحة رقم 1
SEKONIC
STUDIO DELUXE II L-398M
Operating Instructions
ملخص المحتوى في الصفحة رقم 2
Features........................................................................................................2 Specifications................................................................................................4 Part Designations.........................................................................................5 Accessories..................................................................................................6 Basic Operation of Meter Unit....................
ملخص المحتوى في الصفحة رقم 3
Nearly all photographic subjects combine complex variations of strongly reflecting surfaces (high reflectivity) and weakly reflecting surfaces (low reflectivity). These variations delicately influence exposure determination and to which portion the exposure is set becomes a vital factor that considerably affects the appearance of the finished photograph. Although risk of failure can be minimized by taking maximum and minimum readings of all portions of the subject, then averaging the val
ملخص المحتوى في الصفحة رقم 4
7. After combining film sensitivity and shutter speed, direct reading slides (optional) can be used for directly determining the aperture value. 8. Selenium photocell is employed as light sensing element, eliminating need for battery. 9. Wide selection of available accessories allows numerous photographic techniques to be enjoyed. 3
ملخص المحتوى في الصفحة رقم 5
Measuring System Incident light (reflected light system also capable) Measuring Range At ISO 100, EV 4-1 7 Measuring Accuracy Within ± 0.3 EV (1/3f stop) ISO Scale 6 - 12000 Shutter Scale 60 - 1 /8000 second Aperture Scale 0.7-128 Cine Scale 8 fps - 128 fps EV Scale 1 20 (exposure value) Calibration Constant C = 340 K = 1 2.5 Dimensions 112 x 58 x 34 mm Weight Approx. 190 grams (NOTE) The outlooks and specifications described in this booklet shall be changed without pre-advice, i
ملخص المحتوى في الصفحة رقم 6
PART DESIGNATIONS Fror’ Lumlsphera Light sensorm Footcandle scale 1 ,;nrirlan+ linb.+\ P \ Meter pointer Aperture value scale (for direct reading) @ -1 ___ ---. - w , Dial scale wne scale 44 I xopper - button mat A -__...“^ ^^^I^ /- Rear 5
ملخص المحتوى في الصفحة رقم 7
High (H) slide Lumisphere Lumidisc Optional Accessories (sold separately). Direct reading slides. Lumigrid Total of 11 direct reading slides (set of 11 slides in case). e;
ملخص المحتوى في الصفحة رقم 8
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 bright- ness. Then when the button is released, the needle remains fixed at the indicated position. By holding the stopper button depressed and turning it clockwise so that the mark position becomes the needle is released. At this time, the meter will deflect freely even if the stopper button is released. To fix the needle, turn the st
ملخص المحتوى في الصفحة رقم 9
Incident Light Measurement 1. Lumisphere a. Mount Lumisphere sensor To white dots of Lumisphere frame and light sensor, then turn Lumisphere carefully clockwise to secure. b. Set film sensitivity knob to sensitivity value of employed film. Set ISO value to right side ISO mark Photo shows setting for ISO 100. c. From position where subject is to be measured, point Lumi- in direction of sphere camera. (Light sensor be turned freely.) d. Hold meter erect and press
ملخص المحتوى في الصفحة رقم 10
needle deflects according to brightness. When the stopper button is released, the meter needle becomes fixed at the deflected position. If the location is excessively bright and the meter needle deflects beyond scale, insert the High slide e. Read the footcandle indication of the meter needle. f. Transfer footcandle value to the dial scale dial ring and set the scale mark. If the High slide has been inserted, set the mark. 9
ملخص المحتوى في الصفحة رقم 11
g. At this time, the shutter speed scale and aperture scale combination becomes the correct exposure. Example: With High slide inserted, meter indicates 80 footcandles At ISO 100, the proper exposure becomes 1, 250 sec at F 5.6, 1; 30 sec at F!16 and 1 sec at F-90. h. By changing ISO setting, the set combination of shutter speed and aperture scale is automatically altered to the appropriate one corresponding to the changed ISO value. * Meter scale intermediate values intermediate val
ملخص المحتوى في الصفحة رقم 12
2. Lumidisc. Employ for illumination contrast Adjustment and luminance measurement. • Contrast measurement a. Mount Lumidisc sensor Install in the same manner as Lumisphere. b. Hold meter at subject position and point Lumidisc directly toward center of main light. c. Press stopper button read meter scale footcandle indication d. Turn the memo pointer dial and set the pointer 1 7 at the footcandle value the needle points to e. In the same manner, measure the fill-in lig
ملخص المحتوى في الصفحة رقم 13
• Luminance (Lux) measurement a. Mount Lumidisc to light sensor in the same manner as Lumisphere. b. Place Lumidisc parallel with the measured surface. c. Press stopper button and read meter scale footcandle indication d. Multiply this value by 10.76 to obtain lux. Example: 80 x 10.76 = 860.8 lux then multiply If meter deflects beyond scale, insert High slide footcandle indication by 32. Example: 80 x 32 = 2560 footcandles 2560 x 10.76 = 27545.6 lux a. Mount Lumigrid sensor
ملخص المحتوى في الصفحة رقم 14
e. Press stopper button and read meter scale footcandle indication . However, since footcandles are units of incident light only, this value becomes simply a reference. f. Transfer indicated value to dial scale Rotate the dial ring and set mark g. At this time, shutter speed scale and aperture scale combination becomes the correct exposure. Note: Do not employ slides for reflected light measurement. * More accurate results can be obtained for reflected light measur
ملخص المحتوى في الصفحة رقم 15
a. Read meter needle foot- candle indication b. Transfer this number to the dial scale Rotate dial ring and set scale mark If the High slide is inserted, set the mark c. EV value indicated by EV mark becomes the correct exposure value. 2. Employing Cine Scale Incident and reflected light measurements during cine pho- tography are performed in the same manner as described pre- viously. However, since the cine scale numerals correspond to cine camera film speed, re
ملخص المحتوى في الصفحة رقم 16
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 or -2 mark when desir ing to cut the exposure to 1!2 of 1!4 and +1 or +2 mark to multiply the exposure by 2 or 4. Set the appropriate mark, instead of the or, to the dial scale value. EMPLOYING SPECIAL ACCESSORIES 1. Direct Reading Slides A total of 11 slides are available, all of which may be used together with the Lumisphere and Lumidi
ملخص المحتوى في الصفحة رقم 17
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 Slide Application When photographing, select slide from the above table according to film sensitivity and shutter speed. Insert slide and perform measurement in the same manner as for incident light. Read directly the aperture value the meter needle * Since it is not necessary to rotate the dial when employing direct reading slides, se
ملخص المحتوى في الصفحة رقم 18
MEASUREMENT EXAMPLES WITH VARIOUS SUBJECTS 1. Portrait Photography There are various kinds of human subject photography. In a case, for example, of a skier against a snowy mountain background, the human subject simply becomes a picture detail and for the purpose of determining the exposure, this cannot be considered portrait photography. In the final analysis, portrait photography is when the human subject is in the center of the picture and the exposure adjusted to him. In addition,
ملخص المحتوى في الصفحة رقم 19
2. Typical Scenery In the case of scenery, measure by using the Lumisphere at the camera position (refer to section on Incident Light Measurement). Although the previously described standard holding method is adequate, if lighting conditions of subject and camera positions are dissimilar, move the meter to a position where conditions are the same type as those of the subject and point in a direction parallel to the camera optical axis. If the subject is shadowed, either move the measuring
ملخص المحتوى في الصفحة رقم 20
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 measure by standard method from the camera position. Then point the Lumisphere toward the sun and measure. Determine exposure from the mean of the two obtained values. Note: To obtain the mean of the two values, perform as follows. Transfer mean value of the two footcandle indications (aperture scale) to the dial. Example: If 320(8) footca
