Sony HVL-F58AM - Manual (Page 60)

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*4
This flash unit has two wireless control modes, [CTRL1] and [CTRL2]. The wireless
controller indicator on the LCD panel is displayed as follows.
[CTRL1] mode: [CTRL+]
When using HVL-F58AM/HVL-F42AM as off-camera flash, select this mode.
[CTRL2] mode: [CTRL]
When using HVL-F56AM/HVL-F36AM as off-camera flash, select this mode.
When you change the controller mode, set [C03] in the custom setting (page 74).
*5
When using DSLR-A700, this flash unit cannot be set to [CTRL](CTRL2). If the flash
unit is already set to [CTRL], the setting is canceled automatically. For other cameras,
see the operating instructions supplied with each camera.
*6
HVL-F42AM used as off-camera flash is included in the [RMT] group.