Sekonic L-398M manual

Page 28

Shown here is an example of using Lumisphere and by normal measuring method without slide, meter needle indicates 640 foot candles. With film sensitivity of ISO 100, exposure becomes f 45

and shutter speed 1 second. mark at this time indicates 20.

This 20 indicates the exact center point of the luminance range. In the same condition, install Lumigrid and when standard reflectivity of 18% is measured, this means that the dial scale will indicate 20. When determining exposure by using the Lumisphere or Lumidisc,

the

mark will always indicate the center of luminance range,

regardless of whether or not the High slide is inserted.

mark and the

If the measured value is set to the dial scale

 

mark dose not reach the scale, reflected light measurement

with the Lumigrid cannot be performed due to insufficient incident light strength. In other words, if the incident light is less than 160 footcandles, reflected light measurement cannot be performed with the Lumigrid.

Image 28
Contents Sekonic Features Specifications Part Designations Page Page Cine Scale Part Designations Page Stopper Button Operation Incident Light Measurement LumispherePage Page Page Page Other Operations Exposure Value EV number Readout Indication that Employing Special Accessories Page Measurement Examples with Various Subjects Portrait PhotographyObservatorial Scenes Typical SceneryPage Snow Scenes Scenes with Side or Back Lighting Silhouette Photography Applications Summary Illumination Contrast Page Reflected Light Measurement Page Page Illumination Adjustment Stage Adjust luminance range Measuring Method Compensation factor = M + Subject to Compression Enlargement Handling Cautions Sekonic Corporation