Nikon 50DX Instruction Manual - Page 23

Close-Up Flash Photography-continued 5. Tilt the flash head down. • Tilt the flash head down to -18°. • is displayed in the LCD panel. • blinks if the wide-flash adapter is not attached. Attach the wide-flash adapter for close-up flash shooting. • The camera's built-in Speedlight cannot be used when flash head of the SB-50DX is tilted down. When the built-in Speedlight is activated, blinks. Press the camera's Speedlight down to retract it. 6. Set the aperture. • Refer to the table below and use the following equation to determine the aperture. ISO film speed Factor (m/ft.) 25 50 100 200 400 800 1.4/4.6 2/6.6 2/6.6 4/13 4/13 5.6/18 f/stop ≥ factor flash-to-subject distance For example, with a subject 0.5m (1.6 ft.) away using ISO 100 film, the suggested aperture is: f/stop ≥ 2 = 4 0.5 Or, f/stop ≥ 6.6 = 4 1.6 In this instance you should use at least f/4 or even smaller aperture (larger f- number), such as f/5.6 or f/8. 44 7. Compose, focus, confirm the ready-light comes on, then shoot. • If the ready-light on the SB-50DX and the camera's viewfinder ready-light fi blink for approx. 3 sec. after shooting, the flash has fired at its maximum output. This may indicate underexposure has occurred. To compensate, use a wider aperture (smaller f-number). • Vignetting due to lighting situation, lens in use, focal length, etc. may occur in close-up flash shooting. Test shooting is recommended. Usable lenses for close-up flash shooting With a long-size lens, light may be obstructed by the lens barrel. Subject 45 Technical Operation