High Speed Sync thread

I am expecting the YN-568EX to arrive in the next few days and would love to see some pics taken using HSS. Hope a few have some they would share and the settings if possible, or exif

Thanks

Well HSS won't take you into space, in case that's what you were hoping for. Seems that HSS is quite the buzzword these days.

What were you hoping to get from it?

Camera Canon EOS 5D Mark II
Exposure 1/5000 sec
Aperture f/2.0
Focal Length 135 mm
ISO Speed 200
Exposure Bias 0 EV
Flash On, Fired

I think there are a few people out there who have really pushed this technology to the limits and created some very nice images. The issue is really the limited GN of the speedlite when being used in this mode. Four strobes seems to be the minimum to actually be able to produce a real world result. I expect that with the new 600EX-RT and its RF ability, there will be more people exploring the potential of HSS. Of course, that's about a $2800 investment...ouch!

Bob

Love that.

I want to shhot people portraits and be able to subdue the bright sunny days

Well here is one.

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Posted elsewhere hence the link. Shot in daylight, f/4@1/1000, ISO 100.

https://photography-on-the.net …p=14446495&post​count=7022

I'm under the impression that HSS would allow me to get a decent exposure on a bright day outdoors.
Right/Wrong?

Dan Kearley wrote in post #15088480
I'm under the impression that HSS would allow me to get a decent exposure on a bright day outdoors.
Right/Wrong?

Well, it depends.
What does "decent exposure" mean?
I assume you want to shoot wider open to limit your DOF. If you you use a 3 stop ND filter and shoot at you max sync speed, you loose no flash power. If you use HSS and increase your shutter speed by 3 times your max syn speed, you loose a lot of power, starting at -2.5 stops once you go 1/3 stop over your max sync speed.

How big a modifier, how much ambient are you fighting, how far away do you need the light to be?

Maybe not an issue using a bare flash as fill. To many questions.

windpig wrote in post #15088534
If you you use a 3 stop ND filter and shoot at you max sync speed, you loose no flash power.

The flash itself may still be at full power, but the ND filter on the lens reduces the EFFECTIVE contribution of the flash by -3EV, nevertheless!!!

So you might be able to use a 3EV larger f/stop on the lens, for DOF control, but the flash is NO MORE POWERFUL, relative to the ambient light intensity.

For some reason there has been a lot of interest in highspeed sync and using speedlites (or moonlights) to over power the sun.

HSS from Canon is intended to make it possible to use a speedlite as a fill light.

It is a compromise. In order to get a constant light output through out the duration of the shutter slit's travel across the sensor the speedlite has to pulse. This means it will produce much less light, relative to normal, during each pulse.

Here is an image I made testing the YN-622 ETTL triggers with a Nissin Di866 MkII speedlite.
The speedlite was 6 feet from the subject, exposure was ISO 100, F1.2, 1.2, 1/8000.
The ambient exposure was set to -2EV to darken the background.
The sun was backlighting the subject as can be seen on the back of the head.

Wilt wrote in post #15089518
The flash itself may still be at full power, but the ND filter on the lens reduces the EFFECTIVE contribution of the flash by -3EV, nevertheless!!!

So you might be able to use a 3EV larger f/stop on the lens, for DOF control, but the flash is NO MORE POWERFUL, relative to the ambient light intensity.

Well, yes. I guess I assume some things go without saying. But there I go again assuming things

There is another side to the HSS technology that you guys are missing. It's the fast action shooting. The only way I know of to use fill flash on a fast moving subject and not have motion blur is with HSS or leaf shutters. Leaf shutters are somewhat questionable since max speed is usually 1/800sec. That leaves only HSS.

Bob

To guitarjeff and the original post and his follow up stating he wanted to shoot portraits. There are multiple ways to get a shallow depth of field, on a bright sunny day. Using HSS is one way. Another way is to put a 2 or 3 stop Neutral Density Filter on the front of your lens. Either method can be used to get portraits on a bright sunny day. There are other advantages to each method...Check out the Neutral Density Filter thread...

https://photography-on-the.net …/showthread.php​?t=1154254

Lots of good portraits with full on sun, use of flash, with a soft background.

Hope this helps,

110yd