JVC KY-F1030U KY-F1030U digital camera 52 page instruction manual (550KB, PDF) - Page 48

6. Others About ALC and EEI operations ALC stands for Automatic Level Control and EEI for Extended Electronic Iris. (੬ page E34) By making the respective settings, the Automatic Level Control (ALC) will operate under dark lighting, and the electronic shutter (EEI) will operate under bright lighting. Furthermore, setting the IRIS mode to AUTO will synchronize sensitivity, iris and electronic shutter so that an appropriate signal level can be acquired automatically at all times. The ALC mode increases sensitivity from 0dB to +12dB under dark lighting and the EEI modeautomatically adjusts the range of 1/7.5 s to 1/2384.7 s (calculated value) under bright lighting. In other words, the signal level is adjusted in the range of 2 graduations of the aperture under dark lighting and 8 graduations under bright lighting. When the IRIS mode is set to manual, the sensitivity and electronic shutter change continuously while the iris setting stays fixed. (੬ page E33 IRIS MODE) This feature holds the advantage of being able to shoot under changing light conditions without the depth of field altering. MEMO • The status of ALC and EEI can be displayed on the screen. ( ੬ page E40 AE DISPLAY) • When EEI is used, the amount of change in one step of the signal level will be large and the precision becomes bad as the shutter speed is faster. • When analog output is used, and EEI LIMIT is set to 1s when a dark subject is shot, the image will appear intermittently so the 1/7.5s setting should be used. Operational range (when ALC MAX: +12dB) 4 Light: lx 16 63 250 1000 4000 16000 64000 8 31 125 500 2000 8000 32000 640000 +12dB +6dB 0dB EEI LIMIT : When 1/7.5s ALC EEI LIMIT : When 1s F2 F2.8 +12dB +6dB 0dB ALC EEI 1/1.871s 1/3.75s Auto Iris F4 F5.6 F8 1/7.5 EEI 1/15 1/30 1/60 1/120 F11 F16 1/2384.7 E44