SB-800 and receiver PT-04

[support1]

Hello Everyone,
Is it possible to shoot at 1/6400 with SB-800 working in SU-4 mode or remote if I use radio transmitter RF-04 with PT-04 receiver? In other words I need to shoot remotely at 1/6400s.
Thanks

 

[Garbz]

No. You will only be able to shoot at that shutter speed when using iTTL which SU-4 doesn't allow. You camera can't tell the flash that it needs to strobe rapidly (High speed sync) without being directly connected to it, or via a CLS Commander light.