E-M1 and high speed sync

I rarely use HHS but I know that the flash must support the specific cameras HSS mode. Does the Nissin say it will works specifically with Olympus in the HSS mode? My 4 Nikon Speedlites will not work on Olympus in HSS mode, but can be fired in manual. My 2 Olympus FL-600R do allow for HSS.

I don't feel HSS should be used for portraits, most likely will cause blinking. If you want automatic fill flash, the best way to accomplish your portrait shot is to use a Oly flash and use the fill mode with plus compensation to slightly lighten up the face. Does the Nissin work with the E-M1 in flash fill mode? If so then great, if not, you need to shoot manual flash and use the flash's power setting to adjust the output as the cameras flash compensation button may not work. Leave at 1/320 x-sync unless you see any banding, then reduce to 1/250. I have shot with Alien Bees, Godox and many different Nikon flashes in manual with the E-M1 at 1/320 without banding.


Edit: Downloaded the i40 spec sheet and manual and yes is says the i40 will do HHS with Olympus, plus TTL. However in the notes, it also says "FP-High Speed Sync in wireless mode are controlled by a master unit and to refer to your camera manual". Without having one I can't be sure, but I think they mean a Olympus flash that would send out the proper signal to allow the i40 to work in HSS as a remote unit? Do you have an Oly flash you could set to HSS to test this? Wouldn't surprise me that the Oly functions are limited at first, just look at the FujiFIlm small print disclaimers on the spec sheet, none of the wireless or TTL functions work with Fuji.

Glad to see that other flash manufacturers are finally looking at M4/3 and not just working with Canon and Nikon.

 

Doesn't do that for me with. On my E-M1 + i40 in TTL FP mode it picks whatever shutter speed it needs to, with a minimum of the flash slow limit. Are you sure you're testing with enough ambient to warrant such a high shutter speed?

 

Did you set the flash mode on the body to fill rather than auto?

 

Dear all.
this was a truly helpful discussion for me. After struggling with the HSS mode in Nissin i40, on E-M1, I finally discovered how:
At least for the on-camera flash: camera exposure mode A/S/M, flash mode "Fill"; in i40: dial TTL mode, set HSS by pressing the pilot button for 3 sec.
Of course, in aperture priority mode, a proper combination of aperture and ambient light is required for high shutter speeds. And for S or M modes proper exposure might need some testing...
I haven't been able to make i40 to work in wireless HSS TTL slave modes (A-C), but maybe this would need a correct master flash (FL-600R)?.