Nikon D90 user manual Flash Mode, Rear-Curtain Sync

Flash Mode

Press the Mbutton and rotate the main command dial until the desired flash mode is displayed in the control panel.

Mbutton Main command dial Control panel

The current flash mode is displayed in the control panel as shown below.

h

Y(red-eye reduction): Use for portraits. Red-eye reduction lamp lights before flash fires, reducing “red-eye.”

j(off): Flash does not fire even when lighting is poor or subject is back-lit.

AUTO (auto flash): When lighting is poor or subject is back lit, flash pops up automatically when shutter-release button is pressed halfway and fires as required.

SLOW (slow sync): Shutter speed slows automatically to capture background lighting at night or under low light. Use to include background lighting in portraits.

REAR (rear-curtain sync): Flash fires just before shutter closes (see below). If this icon is not displayed, flash will fire immediately after shutter opens.

ARear-Curtain Sync

Normally the flash fires as the shutter opens (“front-curtain sync”; see below at left). In rear- curtain sync, the flash fires just before the shutter closes, creating the effect of a stream of light behind moving subjects.

Front-curtain sync Rear-curtain sync

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