e1: Flash Sync Speed

G button UA Custom Settings menu

Choose the flash sync speed.

Option	Description
[1/200 s (Auto FP)]	Flash sync speed is set to ¹⁄₂₀₀ s. With compatible flash units, auto FP high-speed sync will automatically be enabled at shutter speeds faster than ¹⁄₂₀₀ s. In modes P and A, auto FP high-speed sync will be activated if the actual shutter speed is faster than ¹⁄₂₀₀ s. If the flash supports auto FP high-speed sync, the camera can select shutter speeds as fast as ¹⁄₈₀₀₀ s (or ¹⁄₂₀₀₀ s if [Electronic front-curtain shutter] is selected for Custom Setting d5 [Shutter type]). In modes S and M, the user can select shutter speeds as fast as ¹⁄₈₀₀₀ s when using flash units that support auto FP high-speed sync (or ¹⁄₂₀₀₀ s if [Electronic front-curtain shutter] is selected for Custom Setting d5 [Shutter type]). Rotating the shutter speed dial to X in modes S and M sets shutter speed to ¹⁄₂₀₀ s.
[1/200 s]	Flash sync speed set to selected value, which can be from ¹⁄₂₀₀ to ¹⁄₆₀ s. Rotating the shutter speed dial to X in modes S and M sets shutter speed to the selected flash sync speed. Shutter speed will also be set to the selected flash sync speed in modes S and M if a higher speed is chosen using the shutter speed dial.
[1/160 s]
[1/125 s]
[1/100 s]
[1/80 s]
[1/60 s]

Caution: Auto FP High-Speed Sync

Depending on the shutter speed, horizontal lines may appear in pictures taken using auto FP high-speed sync when [1/200 s (Auto FP)] is selected. This effect can be mitigated by:

choosing a slower shutter speed or
adjusting flash output.

Choosing a Fixed Flash Sync Speed

To fix shutter speed at the value selected for Custom Setting e1 [Flash sync speed] in modes S and M, rotate the shutter speed dial to X. An X (flash sync lock) icon will appear with the flash sync speed in the shooting display.

Auto FP High-Speed Sync

Auto FP high-speed sync allows the flash to be used at shutter speeds as fast as ¹⁄₈₀₀₀ s (or ¹⁄₂₀₀₀ s if [Electronic front-curtain shutter] is selected for Custom Setting d5 [Shutter type]). When [1/200 s (Auto FP)] is selected, the camera automatically enables auto FP high-speed sync at shutter speeds faster than the flash sync speed. This makes it possible to choose the maximum aperture for reduced depth of field even when the subject is backlit in bright sunlight.