User manual SEKONIC L-398M STUDIO DELUXE II
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Manual abstract: user guide SEKONIC L-398M STUDIO DELUXE II
Detailed instructions for use are in the User's Guide.
[. . . ] SEKONIC
STUDIO DELUXE II L-398M
Operating Instructions
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Part Designations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Basic Operation of Meter Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1. Stopper Button Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. Zero Position Check and Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Standard Accessory Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Incident Light Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1. Lumisphere. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2. [. . . ] Observatorial Scenes
This refers to the situation where a distant object in the subject field forms an important part of the pictured scene. 18
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. 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) footcandles and 80(4) footcandles are obtained, the mean value becomes 160(5. 61. In the case of 80(4) and 40(2. 8) footcandles, the intermediate becomes the desired value. In cases of the same aperture, setting the shutter speed to the average is acceptable. Memo pointer is useful for memorizing the first measured value.
19
4. Many cases of problems occur with reflected light measuring methods due to snow surface glare. Freshly fallen snow possesses a reflectivity of approximately 73%, while even after several days in urban areas, this declines only to about 60%. Measurement by standard method is reduced by Example:
Note 1 :
Note:2:
Reduce as much as possible since overexposed snow can take on a flour -like appearance without luster in the finished photograph. 20
0Note 3: In situations with direct or top lighting (sun near zenith), the Lumisphere will detect reflected light from the snow surface. Some means of blocking the light from below becomes required in this case.
b. In some cases, good results can be obtained with reflected light measurement under back light conditions, cloudy snow scenes where glare is less and snow scenes under direct lighting. Install Lumigrid and point light sensor slightly downward to block light from the sky, then from camera position, aim toward subject and measure. Scenes with Side or Back Lighting
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 strongly lighted. Even though standard measurement with the Lumisphere can bring out detail of the darker portions, on occasion, the brighter portions can become overexposed and difficult to see. In some instances, this effect can even be enhanced to produce a special photographic composition, but for a generally more attractive result, perform as follows. First use the Lumisphere and measure by standard method, then determine exposure from the mean value (same technique as used for Observatorial Scenes).
6. Silhouette Photography In situations such as a silhouette of a person, tree or bridge in the foreground against the setting sun and brilliantly shining sky as background, remove slide and point Lumisphere toward the setting
sun to measure (as with Reflected Light Measurement). In this manner, the foreground becomes silhouetted by underexposing the light source.
APPLICATIONS SUMMARY
1. [. . . ] If by experience the required results can be obtained with a luminance range of 16 to 1, a maximum luminance indication of 64 (center point 16 x 4 = 64) becomes the upper limit for desired color reproduction. This means that attractive color reproduction cannot be obtained unless the subject luminance distribution is within 4 ^- 64. Exchange Lumisphere for Lumigrid a check if there are any locations on the subject nd brighter than 64 or dimmer than 4.
c.
d.
Stage 5 Determine correct exposure Although above Stage 4b includes an exposure value measurement using the Lumisphere, perform correct exposure measurement as a final check. With the illumination controlled as described, this should accurately become F/5. 6 1/50 sec. [. . . ]
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