Sony HVL-F36AM - Manual (Page 25)

25
Applications
AF illuminator
In low-light or when subject contrast is low, when the shutter button is
pressed partway down for Auto Focus, the red lamp on the front of the
flash unit will light. This is the AF illuminator used as an aid in Auto
Focus.
• The AF illuminator operates even when the flash is off.
• The camera AF illuminator does not operate while the flash AF
illuminator is operating.
• The AF illuminator does not operate while Continuous AF is used in
focusing mode (when continually focusing on a moving subject).
• The AF illuminator may not operate if the focal length of the lens is
greater than 300 mm. The flash will not operate when removed from the
camera.