Nikon 25203 D1H User's Manual - Page 128

ADVANCED PHOTOGRAPHY-COMPATIBLE SPEEDLIGHTS Compatible Speedlights (continued) Refer to your Speedlight manual for detailed instructions. In the table of different camera types given in the SB-28DX manual, your Nikon digital camera is classified as type A. The shutter will synchronize with the flash when set to speeds of 1/500 sec. or slower. If the flash-ready indicator blinks for about three seconds after a photograph is taken with the SB-80DX, SB-50DX, or SB-28DX set to D-TTL, the photograph may be underexposed. Check the photograph in the monitor. If it is underexposed, adjust the focus distance, aperture, or flash range and try again. The underexposure warning may not be displayed when Speedlights other than the SB-80DX, SB-50DX, or SB-28DX are used with a shutter speed of 1/500 s. Should you find that images are underexposed even when no warning has appeared in the viewfinder, set the shutter speed to 1/250 s and try again. EV steps for exposure control are set to 1/3 increments on the Speedlight exposure display. Therefore when the display on the camera body is set to 1/2 increments (using Custom Setting 20), the Speedlight exposure display will not show the correct ISO value. This does not affect the actual exposure value which will be set as displayed on the camera body. Sensitivity settings available for D-TTL flash photography are ISO 200, 250, 320, 400, 500, 640, 800, 1000, 1250 and 1600 equivalent. If Sensitivity Boost (Custom Setting 31) is used, the flash may not produce appropriate lighting, depending on the aperture or distance to the subject. In the case of Speedlights equipped with an AF-Assist Illuminator, the illuminator will only light when the center focus area is used. When the exposure mode is set to programmed auto, the maximum aper ture varies with sensitivity, as shown below: Sensitivity (ISO equivalent) 200 250 320 400 500 640 Maximum aperture 4.8 5 5.3 5.6 6 6.3 Sensitivity (ISO equivalent) 800 1,000 1250 1600 Maximum aperture 6.7 7.1 7.6 8 For each increase in sensitivity, aperture is stopped down by half a step. If the lens has a smaller maximum aperture than that given above, the maximum aperture will be the maximum aperture for the lens. 114