Nikon 50DX Instruction Manual - Page 18
Exposure Compensation in Flash Photography, Flash Output Level Compensation
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Exposure Compensation in Flash Photography Exposure compensation lets you intentionally modify the correct exposure. Exposure can be controlled when a subject of high reflectivity is included in a picture, or when you want to create flash photographs that are somewhat brighter or darker to match the subject or your creative preferences. Some plus compensation may be necessary when the background includes a mirror, white wall or other highly reflective surface. Likewise, some minus compensation may be required when the background is dark or includes subjects of low reflectivity. You can compensate exposure on both the foreground subject and background, or compensate exposure on only the subject. • To compensate exposure on both subject and background in TTL/ D-TTL auto flash mode • In TTL/D-TTL auto flash mode (p. 25), use the camera's exposure compensation function (see your camera's instruction manual). • The exposure compensation value set on the camera is not displayed in the SB-50DX LCD panel. • Exposure compensation beyond the usable ISO film speed (sensitivity) range for TTL/D-TTL auto flash (p. 21) cannot be performed. For example, making a +3 compensation with ISO 100 film (sensitivity) corresponds to ISO 12, which is out of the usable ISO speed (sensitivity) range (ISO 25 to 1600). With ISO 100 film (sensitivity), you can make plus compensation up to +2 (corresponding to ISO 25). • To compensate exposure on both subject and background in Manual flash mode • In Manual flash mode (p. 31), proper aperture (or standard aperture) for correct exposure can be determined by the equation using the guide number (p. 33). You can intentionally change the aperture to compensate exposure. • To make the subject brighter, use a wider aperture (smaller f-number); to make the subject darker, use a narrower aperture (larger f-number). • To compensate exposure on only the foreground subject • In TTL/D-TTL auto flash mode, adjust the SB-50DX flash output level (flash output level compensation, p. 35). • Flash output level compensation is possible only when using cameras of Group I, II, III or Nikon digital SLR cameras (p. 28). Controlling background exposure in flash photography By setting Slow Sync (p. 20) or by selecting a slower shutter speed than flash sync speed in Shutter-Priority Auto or Manual exposure mode, you can bring out background details using all of the available light. Available flash sync modes and exposure modes vary depending on the camera being used. (See your camera's instruction manual.) 34 Flash Output Level Compensation By adjusting flash output level, you can compensate exposure on a flashilluminated subject while keeping the same background exposure. Flash output level compensation can be performed with cameras of Groups I, II and III and Nikon digital SLR cameras. • Flash output level compensation can be performed with cameras of Groups I, II and III and Nikon digital SLR cameras. With cameras of Group III, set flash output level compensation on the camera. (For details, see your camera's instruction manual.) • In TTL/D-TTL auto flash mode, press the + or - button to adjust flash output level. The LCD panel shows the compensated value with ~ symbol. • You can adjust the flash output level from -3 to +3 EV in 1/3 steps (or in 1/6 steps with Nikon digital SLR cameras). • With a camera having the flash output level compensation function (i.e., F80-series/N80series, F70-series/N70 or PRONEA 600i/ PRONEA 6i), you can set flash output level compensation either on the camera or on the SB-50DX. (Compensation range and step depend on the camera. See your camera's instruction manual). Or, you can add compensation values set on the camera to the value set on the SB-50DX (or vice versa). Note that, in this case, the SB-50DX LCD panel shows the compensation value set on the SB-50DX only. • To cancel flash output level compensation, press the + or - button until the value indication shows "0" and ~ disappears in the LCD panel. (Turning the SB-50DX off does not cancel the flash output compensation.) (See photos on p. 38.) 35 Detailed Operation