76 / 80Copyright © 2014 TOSHIBA TELI CORPORATION, All rights reserved. http://www.toshiba-teli.co.jp/index.htmD4235067D● Setting- Set photometric area size for measuring luminanceSet the following value to “ALCPhotometricAreaSize” register. The setting value is Enumeration type.Value photometric area sizeFull (*) 100% (Full pixel)Medium 64% (H: 80% x V: 80%)Small 4% (H: 20% x V: 20%)* initial factory settingFig.5-19 ALC Area- Set a value of the reference luminanceSet the following value to “ALCReferenceLuminance” registers. These setting values are Integer type.An Image luminance at ALC operation converges on a reference luminance.(at ALCExposureValue = 0 [eV]).ReferenceLuminance ValueMinimum 0Maximum 255* initial factory setting = 84Full = 100% (H:100% x V:100%)Medium = 64% (H:80% x V:80%)Small = 4% (H:20% x V:20%)