Samsung solved the High Sync speed problem !

A drawback of the Samsung NX system was the low Flash sync speed, you could use Flash only below 1/200th shutter speed.

This was THE flash advantage of the more experienced photographic companies , Oly/Sony/Pentax/Canikon.

But now, let me quote from imagingreporter.com regarding new SEF 580A TTL external flash:

The high speed flash sync mode allows for flash with shutter speeds faster than 1/200 of a second, ideal for brightly lit scenes with selective depth of field.

Now the Samsung NX system also belongs to the systems with which you can use fill flash on a sunny day ( for example fort portraits ). Now you can open up the aperture , what leads to faster shutter speeds in the 1/1000 range, and still use flash ( HSS flash ).

Just for fun a little poll attached ( dont take it to serious ). Cheers

Wouldn't it be good for freezing faster movement indoors too?  Dance floor, bowling, I dunno, the 1/180th doesn't seem like it's quite fast enough.

NewForce wrote:

HSS flash is good to have it but was never a must features for most photographers.

I accept that its not for everyone.

Furthermore a HSS flash reduce much flash power so it generally good for close up shot, like a close portrait against sunlight.

I do not want to photograph AGAINST the sun with my little Metz flash, but perhaps IN the sun, and there even a little bit of fill flash improves the harsh shadows.

HSS flash also can't be use for shooting sport event as it distance coverage way too short for any good.

Yes. But perhaps 1% of the photographers are serious  sports photographers

NewForce wrote:

Auto FP mode (HSS) - scantips.com

I read some Chinese websites, they prefer camera with full power flash + ND filter over camera with flash in HSS mode.

Hello, I have just read that pamphlet.

Indeed HSS flash is not able to stop motion to 1/20000 in portraiture, what is what they say against HSS flash.

But that is not my intention, to stop motion to a Microsecond in simple portraiture - what nonsense, sorry.

So a few issue.

HSS allows you to use flash at a higher shutter speed.

When you are shooting a Dancer you need to freeze motion, you can do this in a few different ways. a low ambient light and a short flash duration, or a fast shutter speed and longer flash wit high ambient.

If you are shooting at F11 with a strobe firing at 1/2000 of a second with low ambient 1/100th of a second will be fine. If you can't get enough light out of your flash to get the exposure that fast, then HSS would allow you to pull the power up and use the increased shutter speed to compensate.

The easiest way to think of flash is an external shutter, and it's duration is what will freeze motion most of the time.

I really can't think of another occasion when you need it.

I mean if you are outside and you want F4 and it's the middle of a bight day so you have to put your shutter to 1/2000 of a second which leave the subject underexposed HSS would be a requirement... or you just put a ND Filter on, or light your model with a reflector and it does the same exact thing.

Oh the other time is if you shoot on Aperture Priority mode or TTL and have no idea how to change your settings.

JoePhoto wrote:

I am not sure you understand how HSS flash works ???

It is only useful for very short distances, and usually indoors because GN is further derated outdoors.

It IS useful for portraits, and especially outdoors.

I know that the GN is derated, but the sun shadows are very bad, and flash makes them less bad. The flash dos not have to light the scene - just make the black shadows non-black.

JoePhoto wrote:

Kaziklu wrote:

So a few issue.

HSS allows you to use flash at a higher shutter speed.

When you are shooting a Dancer you need to freeze motion, you can do this in a few different ways. a low ambient light and a short flash duration, or a fast shutter speed and longer flash wit high ambient.

If you are shooting at F11 with a strobe firing at 1/2000 of a second with low ambient 1/100th of a second will be fine. If you can't get enough light out of your flash to get the exposure that fast, then HSS would allow you to pull the power up and use the increased shutter speed to compensate.

How are you going to "pull the power up" when the power drops DRASTICALLY in HSS mode.

And the flash "duration" in HSS mode is 1/200 sec.

I am not sure you understand how HSS flash works ???

It is only useful for very short distances, and usually indoors because GN is further derated outdoors.

The easiest way to think of flash is an external shutter, and it's duration is what will freeze motion most of the time.

I really can't think of another occasion when you need it.

I mean if you are outside and you want F4 and it's the middle of a bight day so you have to put your shutter to 1/2000 of a second which leave the subject underexposed HSS would be a requirement... or you just put a ND Filter on, or light your model with a reflector and it does the same exact thing.

Oh the other time is if you shoot on Aperture Priority mode or TTL and have no idea how to change your settings.

Do you know how flash works? and can you read? 
The Dancer may not have been a great example, the whole purpose of the example was to say that in HSS the motion freezing element stops being the flash and is left reliant on shutter speed. 
HSS duration is 1/200th (I actually think it's 1/250th) of a second and pulses. This is about 1/2 power. at 1/2000th duration you are at about 1/16th power. If you can freeze the motion at 1/800th shutter, so you pick up a little extra light. 
But really you could just raise your strobe power a little and still get the motion. 
There is no reason to use it in doors. I honestly can't think of a single reason to use it indoors. (well maybe indoor sports but even then there are other ways)

NewForce wrote:

ttbek wrote:

Wouldn't it be good for freezing faster movement indoors too? Dance floor, bowling, I dunno, the 1/180th doesn't seem like it's quite fast enough.

Think most of people mis-concept about flashgun high speed sync working logic.

When flashgun in HSS high speed sync mode, it actually work more like a video light with continuous light. Under HSS mode actually loss about 2.3 stop flash power. Imagine a GN56 flashgun is now at GN24.

When in HSS mode with flash pump out continuous light mean it does not provide fast flash light anymore and more probably it can't stop fast motion at all.

If you are interested, scantips.com provide a very details explaination about the disadvantages about using Flashgun in HSS mode. Below the link to it.

Auto FP mode (HSS) - scantips.com

I read some Chinese websites, they prefer camera with full power flash + ND filter over camera with flash in HSS mode.

Thanks to every explaining HSS. I need to get back to threads where I ask something in a more timely fashion. This link was quite helpful. I think that it will do what I was thinking, let me explain. I'm thinking of indoor scenes where the ambient light isn't good, but it's strong enough to still be in your shot and so movement outside the range of the flash is in the shot and not frozen. So with HSS I should be able to light something nearby, and then have the shutter speed freeze both foreground and background. Seems the power in this new flash will be put to work.

Does anyone know if we'll be getting stroboscopic flash?

https://www.metz.de/en/flash-units/hints-guides/stroboscopic-flash.html