Nikon D810 Product Manual - Page 216

Flash mode Rear-curtain sync Description In shutter-priority auto or manual exposure mode, flash fires just before the shutter closes. Use to create effect of a stream of light behind moving objects. In programmed auto and aperture-priority auto, slow rear-curtain sync is used to capture both subject and background. Use of tripod is recommended to prevent blurring caused by camera shake. The flash does not fire. Flash off D The Built-in Flash See page 425 for information on the lenses that can be used with the built-in flash. Remove lens hoods to prevent shadows. The flash has a minimum range of 0.6 m (2 ft) and can not be used in the macro range of zoom lenses with a macro function. i-TTL flash control is available at ISO sensitivities between 64 and 12800; at other sensitivities, the desired results may not be achieved at some ranges or aperture values. If the flash fires in continuous release modes (0 102), only one photograph will be taken each time the shutter-release button is pressed. The shutter release may be briefly disabled to protect the flash after it has been used for several consecutive shots. The flash can be used again after a short pause. 192