Sony FCBEH3300 Product Manual (Tehnical Manual for new HD Block Cameras) - Page 9

Basic Functions AE - Iris priority The iris can be set freely by the user to 16 steps between F1.35 and Close. The gain and shutter speed are set automatically, according to the brightness of the subject. Data 11 10 0F 0E 0D 0C 0B 0A Setting value F1.35 F1.6 F2 F2.4 F2.8 F3.4 F4 F4.8 Data 09 08 07 06 05 04 03 00 Setting value F5.6 F6.8 F8 F9.6 F11 F14 F16 CLOSE AE - Manual The shutter speed (22 steps), iris (16 steps) and gain (16 steps) can be set freely by the user. AE - Bright The bright control function adjusts both gain and iris using an internal algorithm, according to a brightness level freely set by the user. Exposure is controlled by gain when dark, and by iris when bright. As both gain and iris are fixed, this mode is used when exposing at a fixed camera sensitivity. When switching from Full Auto or Shutter Priority Mode to Bright Mode, the current status will be retained for a short period of time. Only when the AE mode is set to "Full Auto" or "Shutter Priority," can you switch it to "Bright." Gain IRIS AGC OPEN MAX IRIS curve Gain curve CLOSE MIN Dark Controlled by gain Controlled by IRIS Bright Bright limit which controllable for this unit Data 1F 1E 1D 1C 1B 1A 19 18 17 16 15 14 13 12 11 Iris F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 F1.35 Gain 28 dB 26 dB 24 dB 22 dB 20 dB 18 dB 16 dB 14 dB 12 dB 10 dB 8 dB 6 dB 4 dB 2 dB 0 dB Data 10 0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 00 Iris F1.6 F2 F2.4 F2.8 F3.4 F4 F4.8 F5.6 F6.8 F8 F9.6 F11 F14 F16 CLOSE Gain 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB When switching from the Shutter Priority mode to the Bright mode, the shutter speed set in the Shutter Priority mode is maintained. Spot Exposure Mode In Full Auto AE, the level for the entire screen is computed and the optimum Auto Iris and Gain levels are determined. In Spot AE, a particular section of the subject can be designated, and then that portion of the image can be weighted and a value computed so that Iris and Gain can be optimized to obtain an image. For example, in an image with a lot of movement and with varying levels of brightness, portions without much change can be designated as such a "spot," and changes to the screen can be minimized in that area. As shown in the diagram below, a range of 16 blocks vertically and 16 blocks horizontally can be designated. In the case where the center is designated (shown in black), the level is computed along with a weighted value for the surrounding block (shaded), including the specified portions; and then the Gain and Iris are set. The value of the designated portions and the surrounding areas should be calculated as 100%, the rest should be set to 20%. The range of the Spot AE frame is fixed to 5 blocks vertically and 4 blocks horizontally. Horizontal 16 0 1 2 3 4 5 6 7 8 9 ABCDEF 0 1 2 Vertical 16 3 4 5 6 7 8 9 A (8,8) B C D E F