Sony FCBH11 Product Manual (FCB-H11 Technical Manual) - Page 9

Basic Functions AE - Iris Priority The iris can be set freely by the user to 18 steps between F1.8 and Close. The gain and shutter speed are set automatically according to the brightness of the subject. parameter 11 10 0F 0E 0D 0C 0B 0A 09 IRIS (F1.8) F No. F1.8 F2.0 F2.4 F2.8 F3.4 F4.0 F4.8 F5.6 F6.8 parameter 08 07 06 05 04 03 02 01 00 IRIS (F1.8) F No F8.0 F9.6 F11 F14 F16 F19 F22 F26 CLOSE AE - Manual The shutter speed (21 steps), iris (18 steps) and gain (8 steps) can be set freely by the user. AE - Bright The bright control function adjusts both the 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," the user can switch it to "Bright." Gain IRIS AGC OPEN MAX IRIS gain curve AGC gain curve CLOSE MIN Dark Controlled by gain Controlled by IRIS Bright Bright limit controllable for this unit Parameter 17 16 15 14 13 12 11 10 0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 IRIS (F1.8) F No. F1.8 F1.8 F1.8 F1.8 F1.8 F1.8 F1.8 F2.0 F2.4 F2.8 F3.4 F4.0 F4.8 F5.6 F6.8 F8.0 F9.6 F11 F14 F16 F19 F22 F26 CLOSE GAIN 18dB 15dB 12dB 9dB 6dB 3dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 0dB 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 following diagram on the next page, 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 9