Nikon D50 manual 112, Maximum aperture at ISO equivalent Mode 200 400 800

Technical Notes—Optional Accessories

Notes on Optional Speedlights

Refer to the Speedlight manual for detailed instructions. If the Speedlight supports the Creative Lighting System, refer to the section on CLS-compatible digital SLR cam- eras. The D50 is not included in the “digital SLR” category in the SB-80DX, SB-28DX, and SB-50DX manuals.

The shutter will synchronize with an external flash at speeds of 1/500 s or slower.

i-TTL and Auto Aperture (AA) flash control are available only with CPU lenses. Se- lecting spot metering while an SB-800 or SB-600 Speedlight is attached activates standard i-TTL Flash for Digital SLR.

i-TTL flash control is available at all sensitivity (ISO equivalency) settings. If the flash- ready indicator blinks for about three seconds after a photograph is taken with i-TTL flash control, the photograph may be underexposed.

When an SB-800 or SB-600 is mounted on the camera, AF-assist illumination and red-eye reduction are performed by the optional Speedlight. With other Speedlights, AF-assist illumination is performed using the AF-assist illuminator on the camera ( 34).

Auto power zoom is available only with SB-800 and SB-600 Speedlights.

In P,, , , , ,, and modes, the maximum aperture (minimum f/-number) is limited according to sensitivity (ISO equivalency) as shown below:

Maximum aperture at ISO equivalent of

		Mode				200	400	800	1600
P,	,	,	,	,	,	4	4.8	5.6	6.7
						8	9.5	11	13

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 that listed above, the maximum value for aperture is 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 using i-TTL Balanced Fill-Flash for Digital SLR. We recommend that you choose spot metering to select Standard i-TTL Flash for Digital SLR. Take a test shot and view the results in the monitor.

In i-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.

112