Nikon D2H 116, Maximum aperture at an ISO equivalent, 250 320 400 500 640 800 1000 1250 1600

Taking Photographs—Flash Photography

Notes on Optional Speedlights

Refer to the Speedlight manual for detailed instructions. If the Speedlight supports i-TTL or D-TTL flash control, refer to the entry for digital SLR cameras in the table of camera types.

If Auto FP High-Speed Sync is not used, the shutter will synchronize with an external flash at speeds of ½50 s or slower.

If the flash-ready indicator blinks for about three seconds after a photograph is taken with i-TTL or D-TTL flash control, the photograph may be underexposed.

The SB-28DX displays exposure in increments of 1/3 EV. If the camera is set to control exposure in increments of ½ EV using Custom Setting b2, the SB-28DX exposure dis- play will not show the correct ISO value. The actual exposure value is not affected.

i-TTL and D-TTL flash control can be used to adjust flash output at sensitivity (ISO equivalency) settings between 200 and 1600. At settings of HI-1 and HI-2, the desired results may not be achieved at some ranges or aperture settings.

The AF-assist illuminator on SB-series 80DX, 28DX, 28, 27, 26, and 24 Speedlights will only light if all of the following conditions are met: focus mode is set to single-servo auto, an AF-Nikkor lens is used, the subject is poorly lit, and the center focus area is selected or dynamic-area AF is used in combination with closest-subject priority.

In programmed auto, the maximum aperture (minimum f/-number) is limited ac- cording to sensitivity (ISO equivalency), as shown below:

Maximum aperture at an ISO equivalent of:

200	250	320	400	500	640	800	1000	1250	1600
4	4.2	4.5	4.8	5	5.3	5.6	6	6.3	6.7

For each one-step increase in sensitivity (e.g., from 200 to 400), aperture is stopped down by half an f/-stop. If the maximum aperture of the lens is smaller than given above, the maximum value for aperture will be the maximum aperture of the lens.

When an SC-series 17, 28, or 29 sync cable is used for off-camera flash photography, correct exposure may not be achieved in i-TTL or D-TTL mode. We recommend that you choose spot metering to select standard i-TTL or D-TTL flash control. Take a test shot and view the results in the monitor.

In i-TTL or D-TTL mode, use the flash panel provided with your Speedlight. Do not use other panels such as diffusion panels, as this may produce incorrect exposure.

D-TTL flash control can not be used for multi-flash photography.

116